“ Additional Terms and Conditions.— The Administrator may require that any conveyance under subsection (a) be subject to such additional terms and conditions as the Administrator considers appropriate to protect the interests of the United States. ”

“ Proceeds.— As consideration for conveyance of the parcel under subsection (a) , the Administrator shall require the Galveston Historical Foundation to pay to the Administrator the fair market value of the parcel, as determined based on an appraisal that is acceptable to the Administrator. ”