Frank Heckenbach wrote:
Since Peter and Gala are from Australia and USA, they can put their works in the public domain, but you cannot. (AFAIK.) You can release it without any extra conditions (such as: "Copyright ... The author gives unlimited permission to copy and/or distribute [it], with or without modifications, as long as this notice is preserved."), or use the license of the original work.
Good to know.
Regards,
Adriaan van Os