(a) The text of the Copyright Clause does not exclude applicationof copyright protection to works in the public domain. [FONT=Century Schoolbook,Century Schoolbook][FONT=Century Schoolbook,Century Schoolbook]Eldred [/FONT][/FONT]is largely dispositive of petitioners’ claim that the Clause’s confinementof a copyright’s lifespan to a "limited Tim[e]" prevents the removal ofworks from the public domain. In [FONT=Century Schoolbook,Century Schoolbook][FONT=Century Schoolbook,Century Schoolbook]Eldred, [/FONT][/FONT]the Court upheld the Copyright Term Extension Act (CTEA), which extended, by 20 years, the terms of existing copyrights. The text of the Copyright Clause, theCourt observed, contains no "command that a time prescription, onceset, becomes forever ‘fixed’ or ‘inalterable,’ "