 Libraries typically require the artist to rename the piece in effect creating a unique artistic work for the library to register with their PRO (BMI, ASCAP, SESAC).Should the composer want to enter the piece into an exclusive agreement with a library or client, they would first need to remove that piece from all non-exclusive agreements.An advantage to using a non-exclusive library is the possible broad exposure through multiple outlets, and the ability of the artist to retain control.