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 negative or the original plate. Existing copyrights are extended through the new period; but for the extended term the rights revert to the author, though an assignee may require continuance of the assignment or continue to publish on royalties, as determined by agreement or arbitration. Assignments, except for parts of collective works, terminate in twenty-five years, when rights revert to the heirs.

The Crown has held an exclusive and perpetual right to license the printing of the Bible, Book of Common Prayer, ordnance surveys, and possibly the Acts of Parliament; and specified universities and colleges were assured perpetual copyright in works given or bequeathed to them unless given for a limited term, but the right lapsed into the usual copyright term unless the work were printed on their own presses and for their own benefit. Under the new code, "without prejudice to any rights or privileges of the Crown," any work prepared or published for His Majesty or any Government department has copyright for fifty years from first publication — the effect of which provision on Crown perpetual copyrights is not clearly evident. A saving clause protects the universities "in any right they already possess," inferentially limiting their future copyrights to the statutory term. After the death of the author of a literary, dramatic or musical work, on complaint of the withholding of the work from publication or performance, the Judicial Committee of the Privy Council may require the owner to grant a license to reproduce or perform the work in public under conditions determined by" the Committee. After twenty-five years, or in the case of existing copyrights thirty years from the author's death, the work may be reproduced by any person on prescribed notice in writing of his intention and payment of ten per cent on the published