36 C.F.R. § 51.95
In approving an assignment or encumbrance, the Director has no duty to inform any person of any information the Director may have relating to the concession contract, the park area, or other matters relevant to the concession contract or the assignment or encumbrance. In addition, in approving an assignment or encumbrance, the Director makes no representations of any nature to any person about any matter, including, but not limited to, the value, allocation, or potential profitability of any concession contract or assets of a concessioner. No approval of an assignment or encumbrance may be construed as altering the terms and conditions of the applicable concession contract unless expressly so stated by the Director in writing.
36 C.F.R. § 51.95