36 CFR 51.88: What happens if an assignment or encumbrance is completed without the approval of the Director?

Assignments or encumbrances completed without the prior written approval of the Director will be considered as null and void and a material breach of the applicable concession contract which may result in termination of the contract for cause. No person will obtain any valid or enforceable rights in a concessioner, in a concession contract, or to operate or manage under a concession contract as a subconcessioner or otherwise, or to leasehold surrender interest or possessory interest, if acquired in violation of the requirements in this subpart.