Many people don't realize the myriad of subtle differences that come into play. Patents, trademarks, copyright, royalties, and licensing are huge areas of legal practice. much of that is covered under Federal laws, but "personality" use issues are almost exclusively handled by the states. There is a reason why IP law is one of the few growth areas in corporate law today. Funny thing, I have a few DVDs of old tv programs where some of the music is changed, the original rights deals didn't cover anything other than tv use, because home video didn't exist. When a deal could not be made, the music had to changed to release the show....