Section 13.116 - Permittee's interest(a) A permittee shall not accrue a compensable interest in a cabin or other structure in a park area unless specifically authorized by Federal statutory law.(b) A cabin or other structure in a park area may not be sold, bartered, exchanged, assigned or included as a portion of any sale or exchange of other property by a permittee unless specifically authorized by Federal statutory law.(c) The Superintendent shall determine the extent and nature of a permittee's possessory interest at the time a permit is issued or denied.