No licensed promoter shall have the right to assign any contract with a licensed professional boxer or licensed mixed martial artist for activities to take place within the State of New York without first obtaining the boxer's or mixed martial artist's written consent. Such consent shall not be required if the promoter assigns less than all the rights under any such contract with respect to a particular bout.
N.Y. Comp. Codes R. & Regs. Tit. 19 § 209.16