Every grant of exclusive rights must, in a society that values both the reward of creative effort and the freedom of public access to culture and knowledge, have a defined limit. Copyright is no exception. The rights that the Copyright Act, 1957 confers upon authors, producers, performers and broadcasters are not permanent. They subsist for a specified period determined by the category of the work, the circumstances of its creation, the nationality of its author and in some cases the date of its first publication. When that period expires, the work enters the public domain it may be freely reproduced, adapted, performed, broadcast and built upon by anyone, without permission and without payment.
The duration of copyright is therefore not merely a technical question of when a licence is required. It is a policy question about the appropriate balance between the private interests of rights holders and the public interest in access to the cultural and intellectual heritage that creative works represent. Too short a term and creators are denied the economic return needed to sustain creative enterprise. Too long a term and works are locked out of the public domain for generations, restricting scholarship, education, cultural expression and the creative building upon the past that has always been the engine of artistic innovation.
India’s current copyright duration framework, established by the Copyright Act, 1957 and shaped by successive amendments, reflects the international minimum standards of the Berne Convention while adopting in certain respects a more generous approach. The basic term for literary, dramatic, musical and artistic works is sixty years post mortem auctoris sixty years calculated from the beginning of the calendar year following the year of the author’s death. For other categories of work cinematograph films, sound recordings, broadcasts and government and international organisation works different rules apply, reflecting both the different character of those works and the different policy considerations that govern their protection.
This article offers a comprehensive examination of the duration rules for every category of work recognised under Indian copyright law explaining not just what the rules are but why they take the form they do, how they apply in complex cases of joint authorship, anonymous and pseudonymous works, posthumous publication and works created in the course of employment and what the consequences of copyright expiry are for rights holders, users and the public domain.
The Foundational Framework Section 22 and the Post Mortem Auctoris Term
Section 22 of the Copyright Act, 1957 establishes the baseline duration rule for the largest and most significant category of protected works: original literary, dramatic, musical and artistic works. It provides that copyright in such works shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the author dies.
The phrase “beginning of the calendar year next following the year in which the author dies” is a precise formulation that the Act uses consistently across all its duration provisions. Its effect is to standardise the calculation by fixing the commencement of the terminal period not at the precise date of the relevant event the author’s death, the work’s publication, the film’s completion but at the beginning of the following calendar year. This approach, sometimes called the “year-end rule,” simplifies the calculation of when copyright expires by ensuring that all works whose relevant event occurred in the same calendar year expire simultaneously at the end of the sixtieth year following that calendar year.
To illustrate: if an author dies on the 15th of March 2025, the relevant calendar year is 2025, the “beginning of the calendar year next following” is the 1st of January 2026 and copyright expires sixty years after that date that is, at the end of the calendar year 2085, on the 31st of December 2085. The work enters the public domain on the 1st of January 2086.
The post mortem auctoris basis of the term duration measured from the author’s death rather than from the work’s creation or publication reflects a deliberate policy choice embedded in the Berne Convention and adopted by virtually every major copyright jurisdiction. The rationale is that the author’s lifetime interest in their work and the economic interests of their immediate heirs should be fully protected and that the specific duration of sixty years after death is a reasonable approximation of the period needed to protect the author and two generations of their descendants.
India’s adoption of the sixty-year post mortem term rather than the Berne Convention’s minimum of fifty years post mortem reflects a decision to provide more generous protection than the international minimum requires. The choice of sixty years aligns India with a group of countries that have adopted this term, though it falls short of the seventy-year term that the United States, the European Union and other major jurisdictions have adopted. The practical consequence of this difference is that some works that have entered the public domain in India have not yet done so in the United States or the EU, creating potential complications for the international exploitation of Indian creative works.
Literary, Dramatic, Musical and Artistic Works Section 22
Section 22 applies to the four primary categories of authorial works: literary works (including computer programs, tables and compilations), dramatic works, musical works and artistic works (including paintings, sculptures, drawings, engravings, photographs and works of architecture).
For all works in these categories, copyright subsists for sixty years from the beginning of the calendar year following the year of the author’s death, subject to the special rules for joint authorship, anonymous and pseudonymous works, posthumous publication and works created in specific contexts that are examined below.
The term applies regardless of when the work was created or published. A novel written in 1930 and published in 1935 by an author who died in 1960 has a copyright term running until the end of 2020. A poem written and published in 2020 by an author who dies in 2080 will remain in copyright until the end of 2140. The date of creation and the date of publication are irrelevant to the duration calculation under Section 22 only the author’s death date matters.
The rule creates an important practical distinction between short-lived and long-lived authors. A composer who dies young at thirty-five, having created a significant body of work leaves works whose copyright will expire thirty-five years earlier than the works of a contemporary who dies at seventy. This variation in effective term length for works of the same vintage is an inherent feature of the post mortem auctoris approach and is generally accepted as a reasonable incident of a term defined by reference to personal lifetime.
Joint Authorship Section 22 Applied to Multiple Authors
Where a literary, dramatic, musical or artistic work is a work of joint authorship a work produced by the collaboration of two or more authors in which the contribution of one author is not distinct from the contribution of the other authors the duration of copyright is calculated by reference to the death of the last surviving author.
Section 22 does not separately address joint authorship, but the general principle that the term runs from the death of the author means that for joint works, it runs from the death of the last author to survive. This rule which applies in the same form in the Berne Convention countries and in UK and EU law ensures that the copyright term for a jointly authored work is at least as long as the life of the longest-surviving author plus sixty years, providing comparable protection to works created by a single long-lived author.
The practical consequence is that jointly authored works may remain in copyright considerably longer than works of single authorship from the same period. A play co-written by two authors in 1950, one of whom dies in 1970 and the other in 2000, has a copyright term running until the end of 2060 the same as if the surviving co-author had written it alone. This extended term benefits the heirs of the predeceasing author alongside those of the surviving author, creating a potentially complex ownership structure in the terminal period.
For works of joint authorship where the contributions of different authors are distinct and separable where each author’s contribution can be identified and attributed separately the joint authorship doctrine does not apply and each author’s contribution attracts its own separate copyright term running from that author’s death. Whether contributions are distinct or inseparable is a factual question that courts have addressed in various contexts, with the general principle that where the work could not exist in its present form if the contributions were separated, joint authorship is present.
Anonymous and Pseudonymous Works Section 23
Section 23 of the Copyright Act establishes special duration rules for works published under a pseudonym or anonymously. The rule is designed to provide copyright protection for works whose authors are not publicly identified, without requiring that the author’s identity and therefore the author’s death date be established in order to determine when copyright expires.
Section 23(1) provides that in the case of a literary, dramatic, musical or artistic work published anonymously or under a pseudonym, copyright shall subsist until sixty years have elapsed since the beginning of the calendar year next following the year in which the work was first published. The term for anonymous and pseudonymous works is therefore measured from publication rather than from the author’s death a necessary departure from the general rule given that the author’s identity and therefore their death date, is unknown.
Section 23(2) provides an important qualification: if the identity of the author becomes known before the expiry of the sixty-year period from publication, the copyright term reverts to the standard post mortem auctoris rule of Section 22 sixty years from the beginning of the calendar year following the year of the author’s death. The effect is that the anonymous or pseudonymous term operates only as long as the author’s identity remains unknown. Disclosure of identity triggers a switch to the standard term, which may be either longer or shorter than the anonymous term depending on when the author dies relative to when the work was published.
The provision incentivises the disclosure of authorship, since an author who publishes anonymously but is long-lived will benefit from a longer effective copyright term if their identity becomes known than if it remains permanently concealed. Conversely, an author who publishes anonymously and dies shortly after publication may be better protected by the anonymous term than by the standard term if the work was published many decades before the author’s death.
For practical purposes, works published anonymously or pseudonymously that have not had their authorship disclosed within sixty years of publication enter the public domain at the end of that sixty-year period, regardless of whether the author is still alive.
Posthumous Works Section 24
Section 24 of the Copyright Act addresses works that have not been published during the author’s lifetime. The duration rules for posthumous works vary depending on when and how the work is first published after the author’s death.
Section 24(1) provides that in the case of a literary, dramatic or musical work or an engraving, where copyright subsists at the date of the author’s death but the work has not been published before that date, copyright shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the work is first published.
This provision creates a publication-based term for posthumous works a rule that can substantially extend the copyright in works that remain unpublished for many years after their author’s death. Consider an author who dies in 1960 having left an unpublished manuscript. If the manuscript is first published in 2020, copyright subsists until the end of 2080. The copyright that would have expired in 2020 under the standard Section 22 term sixty years after the author’s death is extended by sixty years from publication to 2080. The incentive created by this provision is clear: publication of a previously unpublished work triggers a fresh sixty-year term, rewarding whoever undertakes the publication.
Section 24(2) provides the corresponding rule for photographs: copyright in a photograph that has not been published before the author’s death shall subsist until sixty years have elapsed from the beginning of the calendar year following the year in which the photograph is first published.
The posthumous work provisions raise important questions about works that remain permanently unpublished. If a work is never published if it remains in manuscript form in a private archive indefinitely the copyright under Section 24 never begins to run from publication, because publication never occurs. The standard Section 22 term has already expired by the time publication eventually occurs. The Section 24 term then applies from the date of eventual publication. This creates, in principle, the possibility of perpetual copyright through non-publication a copyright owner who withholds a work from publication could, by publishing it at a moment of commercial advantage, obtain a fresh sixty-year term indefinitely. This anomaly has been criticised in academic literature but has not been addressed by legislative amendment.
Cinematograph Films Section 26
Section 26 of the Copyright Act establishes the duration rule for cinematograph films. It provides that copyright in a cinematograph film shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the film is published.
Three features of this provision distinguish it from the Section 22 rule for authorial works. First, the term is measured from publication rather than from the author’s death a reflection of the fact that the “author” of a cinematograph film is the producer, an entity that may be a company rather than an individual and companies do not have lifetimes in the way that individual authors do. Second, the term commences from publication of the film rather than from its creation, meaning that unreleased films do not begin to accumulate their copyright term until they are made available to the public. Third, the sixty-year term from publication is shorter than the effective copyright term that would result from a life-plus-sixty calculation for a film made by an individual producer who lives for many years after the film’s release.
Publication of a cinematograph film for the purposes of Section 26 occurs when the film is first made available to the public typically, the date of theatrical release or the date of the first broadcast or other public communication if the film is never theatrically released. The copyright in a film released in 1965 expires at the end of 2025. The copyright in a film released in 2025 expires at the end of 2085.
The film copyright term is separate from and independent of the copyright terms of the constituent works incorporated in the film. A film released in 2025 incorporating a musical score composed by an author who dies in 2060 has a film copyright expiring in 2085 and a musical work copyright expiring in 2120. The expiry of the film copyright does not affect the copyright in the musical score after 2085, the film as a whole is in the public domain but the score remains protected for a further thirty-five years.
Sound Recordings Section 27
Section 27 of the Copyright Act establishes the duration rule for sound recordings. It provides that copyright in a sound recording shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the sound recording is published.
The structure of the sound recording term is identical to the film term sixty years from publication, with publication typically occurring at commercial release. The sound recording copyright for a recording released in 1980 expired at the end of 2040. A recording released in 2025 will remain in copyright until the end of 2085.
As with films, the sound recording copyright is independent of the copyright in the underlying musical and literary works. A recording of a song released in 1960 by an artist who is still alive has its sound recording copyright expired since 2020, but the musical composition copyright running from the composer’s death and the literary work copyright in the lyrics running from the lyricist’s death may still subsist if the composers and lyricists died less than sixty years ago.
This independence of the sound recording term from the underlying work terms creates an important practical distinction. After the sound recording copyright expires, anyone may reproduce, broadcast or distribute the specific recording without the sound recording producer’s authorisation. They may not, however, reproduce the underlying musical composition or lyrics without the authorisation of the musical work and literary work copyright owners, unless those works are also in the public domain.
The practical consequence for classic recordings is significant. Many recordings from the early decades of the commercial music industry recordings from the 1930s, 1940s and 1950s have had their sound recording copyrights expire. These recordings are free for any person to copy and distribute from the sound recording perspective. But the underlying songs may still be under copyright if the composers and lyricists died within the past sixty years and their performance and reproduction requires the authorisation of the musical and literary work copyright owners.
Government Works Section 28
Section 28 of the Copyright Act establishes the duration of copyright in works owned by the Government works made or first published by or under the direction or control of the Government or any public undertaking.
Section 28 provides that copyright in Government works shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the work is first published. The Government copyright term is therefore a publication-based sixty-year term, identical in structure to the film and sound recording terms.
This provision covers a wide range of official publications legislative texts, government reports, official gazettes, survey maps, official photographs and government-commissioned creative works. The sixty-year publication-based term reflects the impracticability of applying a post mortem auctoris rule to government works, since the government is not an individual whose death can be determined.
The Government copyright term creates an important distinction between works that the Government holds as first owner under Section 17(dd) and works in which individual authors hold copyright that the Government subsequently acquires by assignment. For the former, the Section 28 term applies. For the latter, the individual authorship term of Section 22 applies, because the work was not “made or first published by or under the direction or control of” the Government it was made by an individual author and subsequently assigned to the Government.
Judicial decisions of the courts present a special case within Government works. The reasoning in the Eastern Book Company case strongly supports the view that raw judicial decisions are in the public domain that the Government’s nominal copyright in them is not enforced and that their reproduction is effectively unrestricted. Whether this reflects a formal public domain status or merely a policy of non-enforcement is not entirely clear from the decided cases, but the practical result is that judicial decisions may be freely reproduced for any purpose.
Works of International Organisations Section 41
Section 41 of the Copyright Act addresses the copyright in works published by certain international organisations specifically, works first made or published by or under the direction or control of the United Nations, the Specialized Agencies of the United Nations or the Organisation of American States.
Section 41 provides that copyright in such works shall subsist until sixty years have elapsed after the beginning of the calendar year next following the year in which the work was first published. The term structure is identical to Government works a publication-based sixty-year term.
The inclusion of international organisation works in the copyright framework and the grant of copyright to organisations rather than to individual authors, reflects the unique character of these bodies and their publications. Documents produced under the authority of international organisations conventions, resolutions, technical standards, official reports represent collaborative institutional production that does not correspond to individual authorship and the publication-based term is the appropriate framework for this category.
Broadcasts Section 37(3)
Section 37(3) of the Copyright Act establishes the duration of broadcast reproduction rights. It provides that the broadcast reproduction right shall subsist until twenty-five years have elapsed from the beginning of the calendar year next following the year in which the broadcast is made.
The broadcast reproduction right is a narrower and shorter right than the copyright in other works. It protects the broadcast signal the specific transmission made by a broadcasting organisation against reproduction, re-broadcast and communication to the public without authorisation. It does not protect the content of the broadcast, which may be separately protected by copyright in the underlying works.
The twenty-five-year term for broadcasts is substantially shorter than the sixty-year terms for other categories of works. This shorter term reflects the nature of the broadcast as a transient act of communication rather than a durable creative work and the judgment that the investment in broadcasting does not require the same duration of protection as the investment in original creative production.
The practical significance of the broadcast reproduction right in the contemporary media environment has been reduced by the development of digital recording technologies and streaming services, which have made the recording and redistribution of broadcast signals a widespread and difficult-to-control activity. The twenty-five-year term means that broadcasts from before the current year minus twenty-five broadcasts made before the year 2001 at the present time have had their broadcast reproduction rights expire.
Performers’ Rights Section 38(4)
Section 38(4) of the Copyright Act, introduced by the Copyright (Amendment) Act, 2012, provides that performers’ rights shall subsist until fifty years have elapsed from the beginning of the calendar year next following the year in which the performance is made.
The fifty-year term for performers’ rights is measured from the making of the performance the date of the live or recorded performance rather than from the performer’s death. This publication-independent calculation reflects the practical reality that many performances are not recorded at all and those that are may be recorded at a different time from their first public performance. The term is shorter than the sixty-year author’s rights term, reflecting the international standard under the WIPO Performances and Phonograms Treaty, 1996, which requires a minimum term of fifty years for performers’ rights.
The fifty-year performers’ rights term applies to all performances live musical performances, recorded performances, filmed performances and performances in any other medium. For a performance given in 1990, the performers’ rights expired at the end of 2040. For a performance given in 2025, the performers’ rights will subsist until the end of 2075.
The performers’ rights term is independent of the copyright in the sound recording of the performance. A sound recording of a performance given in 2025 has a sound recording copyright term running sixty years from publication of the recording, while the performers’ rights in the same performance run fifty years from the performance itself. Where the performance and the recording occur in the same year, the performers’ rights expire ten years before the sound recording copyright meaning that after fifty years, performers may no longer control the use of their performance while the sound recording producer retains rights for a further ten years.
The Term Before the 1994 Amendment Transitional Considerations
The Copyright (Amendment) Act, 1994 substantially revised the duration provisions of the Act. Before the 1994 amendment, the copyright term for most works was fifty years post mortem auctoris fifty years from the beginning of the calendar year following the year of the author’s death. The 1994 amendment extended this term to sixty years, bringing India into alignment with the majority of Berne Convention countries that had adopted the sixty-year standard.
The extension of the term to sixty years applies to works in which copyright was still subsisting at the time the amendment came into force. Works whose copyright had already expired under the fifty-year rule works whose authors had died more than fifty years before the amendment were not revived by the extension. The extension applies prospectively to works still in copyright, extending their remaining term to the new sixty-year baseline.
This transitional question has practical importance for works created in the early to mid-twentieth century. An author who died in 1940 had their works’ copyright expire in 1990 under the fifty-year rule ten years before the 1994 amendment. Those works entered the public domain in 1990 and remain there the 1994 amendment did not revive them. An author who died in 1945 had their works’ copyright due to expire in 1995. The 1994 amendment, coming into force before that expiry, extended the term to sixty years meaning the copyright in those works now runs until 2005. Under the fifty-year term, they would have entered the public domain in 1995; under the extended sixty-year term, they entered in 2005.
Residual Term and the Calculation of Expiry
The calculation of when a specific work’s copyright expires requires the following analysis, applied to the appropriate category of the work:
For literary, dramatic, musical or artistic works under Section 22, the steps are to identify the year of the author’s death, add one to move to the following calendar year and add sixty to that year. The result is the year at the end of which copyright expires. The work enters the public domain on the first day of the following year.
For works created by unknown authors whose identity has not been disclosed, the calculation under Section 23 uses the year of first publication in place of the year of death.
For posthumous works under Section 24, the calculation uses the year of first publication after the author’s death.
For films under Section 26 and sound recordings under Section 27, the calculation uses the year of the work’s first publication.
For Government works under Section 28, the calculation uses the year of first publication.
For broadcasts under Section 37, the calculation uses the year of the broadcast but the terminal period is twenty-five years rather than sixty.
For performers’ rights under Section 38(4), the calculation uses the year of the performance and the terminal period is fifty years.
In each case, the year-end rule applies: the terminal period runs from the beginning of the calendar year following the relevant event and copyright expires at the end of the year in which the terminal period concludes.
Works in Multiple Categories The Complexity of Layered Copyrights
Many commercially significant works involve multiple overlapping copyrights in different categories, each with its own duration rule. The analysis of when all copyright in a work expires requires identification and separate calculation for each copyright layer.
A commercially released popular song from the 1970s involves the following copyright layers and corresponding terms: the copyright in the musical composition sixty years from the death of the composer; the copyright in the lyrics sixty years from the death of the lyricist; the copyright in the sound recording sixty years from the year of publication of the recording; and the performers’ rights fifty years from the year of the performance. Each expires at a different time and the work is not fully in the public domain until the last of these terms expires.
A cinematograph film involves the copyright in the film itself under Section 26, the copyright in the screenplay as a literary work, the copyright in the musical score and lyrics, the copyright in the sound recording and potentially the copyright in various artistic works included in the film. Each of these copyrights has its own owner, its own term and its own expiry date.
The complexity of layered copyrights creates what is sometimes called the “clearance problem” the practical difficulty of determining, for any given work, whether all the relevant copyrights have expired and the work is fully in the public domain. For commercial users who wish to reproduce or adapt classic works, this clearance problem requires a detailed investigation of the ownership and duration of each copyright layer, with particular attention to the death dates of individual authors and the publication dates of recorded elements.
The Significance of Public Domain Entry
When copyright in a work expires, the work enters the public domain. Public domain status has profound implications for access, scholarship, creative expression and commercial exploitation. A work in the public domain may be freely reproduced, distributed, adapted, performed and built upon by anyone, without seeking permission, paying licence fees or acknowledging any rights holder.
The public domain is the foundation of creative reuse the tradition by which each generation of artists builds upon the creative legacy of its predecessors. Every adaptation of a Shakespeare play, every new setting of a folk melody, every scholarly edition of a classic text, every translation of a literary masterpiece all depend on the public domain status of the original work. As copyright terms lengthen, the public domain grows more slowly and the works available for free creative engagement accumulate at a reduced pace.
The entry of works into the Indian public domain occurs under the rules described above and is determined by Indian law regardless of the copyright status of the same works in other jurisdictions. A work that has entered the public domain in India may still be under copyright in the United States or the EU and vice versa. An Indian publisher who reproduces a work that is in the public domain in India may face infringement claims in other jurisdictions if that work is still protected there.
The practical management of the public domain identifying which works have entered it, clearing the various copyright layers for complex works and navigating the international variation in term lengths is an ongoing challenge for publishers, scholars, filmmakers and all those who wish to make use of the cultural heritage that copyright has temporarily enclosed.
The Term Extension Debate
The appropriate duration of copyright is a subject of ongoing policy debate in India and internationally. Rights holders particularly the music and film industries have consistently advocated for term extension, arguing that longer terms provide greater incentive for creative investment and better protect the economic interests of creators and their heirs. Scholars, librarians and public interest advocates have argued that existing terms are already too long, that the evidence for any incentive effect of extension is weak and that longer terms impose significant costs on access to culture and knowledge without commensurate benefits.
The United States extended its copyright term from life-plus-fifty to life-plus-seventy in 1998 the Sonny Bono Copyright Term Extension Act a change that applied retrospectively to extend the terms of existing works. The European Union had adopted the same seventy-year post mortem term through the Term Directive in 1993. The result is that many works that are in the public domain in India protected for only sixty years after the author’s death remain under copyright in the United States and the EU, where the seventy-year term applies.
India has not extended its copyright term to match the American and European standard. Whether it should do so is a policy question that involves weighing the international harmonisation benefits against the domestic costs the delay in public domain entry, the restriction on scholarship and education and the extension of protection for a period that provides no credible incentive effect given that no living author can be influenced by a prospective extension of rights they will not live to enjoy.
Conclusion
The duration of copyright is not a technical footnote to the substantive rights that the Copyright Act confers. It is a central element of the bargain that copyright represents the period during which the exclusive rights last, balanced against the public interest in free access to the works that those rights protect once the balance tips in favour of the public domain.
India’s duration framework is broadly coherent and reasonably well calibrated. The sixty-year post mortem auctoris term for authorial works provides adequate protection for creators and their immediate heirs. The publication-based terms for films, sound recordings and Government works reflect the character of those works and the nature of their producers. The shorter terms for broadcast reproduction rights and performers’ rights reflect the different nature and commercial logic of those entitlements. And the year-end rule provides a uniform, administratively workable mechanism for calculating when copyright expires.
The gaps and challenges that remain are real. The difference between the Indian sixty-year term and the seventy-year terms of the United States and European Union creates international asymmetries that affect the exploitation of Indian works in foreign markets. The potential for perpetual copyright through deliberate non-publication of posthumous works is an anomaly that the Act does not address. The layered copyright structure of complex works like films creates clearance difficulties that even sophisticated users find daunting. And the ongoing policy debate about whether copyright terms should be extended further or, in the view of some, shortened reflects the continued tension between the private interests that copyright serves and the public interest in a rich and accessible cultural commons.
For practitioners, the duration rules are the starting point for every copyright clearance analysis and the foundation of every licensing structure. For creators, they define the period within which commercial exploitation of their work is protected. And for the public, they mark the moment when the works that enrich culture and advance knowledge become freely available to all the moment when copyright’s temporary exclusion ends and the permanent inheritance of the public domain begins.
References
- The Copyright Act, 1957, Sections 22, 23, 24, 26, 27, 28, 37(3), 38(4), 41 https://copyright.gov.in/Documents/CopyrightRules1958.pdf
- The Copyright (Amendment) Act, 1994 https://copyright.gov.in
- The Copyright (Amendment) Act, 2012 https://copyright.gov.in/Documents/Amendment_Act2012.pdf
- Eastern Book Company v. D.B. Modak, (2008) 1 SCC 1 (Supreme Court of India) https://indiankanoon.org/doc/1023365/
- Indian Performing Right Society v. Eastern India Motion Pictures Association, AIR 1977 SC 1443 https://indiankanoon.org/doc/553674/
- Berne Convention for the Protection of Literary and Artistic Works, Articles 7, 7bis https://www.wipo.int/treaties/en/ip/berne/
- TRIPS Agreement, Article 12 https://www.wto.org/english/docs_e/legal_e/27-trips.pdf
- WIPO Performances and Phonograms Treaty, 1996, Article 17 https://www.wipo.int/treaties/en/ip/wppt/
- EU Term Directive, Directive 2006/116/EC https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32006L0116
- Sonny Bono Copyright Term Extension Act, 1998 (US) https://www.copyright.gov/legislation/s505.pdf
- UK Copyright, Designs and Patents Act, 1988, Chapter I, Duration https://www.legislation.gov.uk/ukpga/1988/48/contents
- Feist Publications Inc. v. Rural Telephone Service Co., 499 U.S. 340 (1991) https://supreme.justia.com/cases/federal/us/499/340/
- Copyright Office of India https://copyright.gov.in
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