Copyright

Copyright (c) 2001 Your Name. All rights reserved.
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.

Terms of Perl itself

a) the GNU General Public License as published by the Free
   Software Foundation; either version 1, or (at your option) any
   later version, or
b) the "Artistic License"

This statement should at least appear in the README file

You may also wish to include it in a Copying file and your source files

Remember to include the other words in addition to the Copyright

Other licenses work also, but code wants to be free

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