Yup, definately something to be careful about. You should always know if a song you're singing belongs to a family or individual just as you should know the correct words and their meaning, what type of song it is,etc... I 've learned a couple of great songs but can't sing them unless I'm with the guy who taught them to me. They belong to a certain family and he sang with them for many years before I new him, but I don't know the family, so I don't have rights to the songs. I have heard some of them on tape recorded at powwows but not put out professionaly so this is where you can run into problems with those 'rules'. Best advice, know the source of the song before you sing it and don't be 'tape happy'!