On first glance, I'd say that this gives the model too much control over you and doesn't actually solve the legal issues satisfactorily. You have paid him/her when this release is signed. With para 2, he/she can prevent you from publishing by not signing a second release while, at the same time under para 3, he/she could be using the same images for self-promotion. Personally, I'd say para 1 is so vague as to be useless. If a disagreement arises, how is either party going to prove what you showed in that portfolio as per that para as a representative sample? It also refers to agreements made outside of this agreement which is another vague minefield sine they are not specified or even legally included by reference. No offense, but I think you need to head back to the drawing board on this one. Cheers, Richard