; and (B) in accordance with nationally recognized appraisal standards. (2) Equalization If the values of the Federal land and non-Federal land to be exchanged under this section are not equal, the values shall be equalized through— (A) a cash payment; or (B) adjustments to the acreage of the Federal land or non-Federal land to be exchanged, as applicable. (c) Payment of costs of conveyance (1) Payment required As a condition of the exchange authorized under this section, the Secretary shall require the Post to pay the costs to be incurred by the Secretary, or to reimburse the Secretary for the costs incurred by the Secretary, to carry out the exchange, including— (A) survey costs; (B) any costs relating to environmental documentation; and (C) any other administrative costs relating to the land exchange. (2) Refund If the Secretary collects amounts from the Post under paragraph (1) before the Secretary incurs the actual costs and the amount collected by the Secretary exceeds the costs actually incurred by the Secretary to carry out the land exchange under this section, the Secretary shall provide to the Post a refund of the excess amount paid by the Post. (3) Treatment of certain amounts received Amounts received by the Secretary from the Post as reimbursement for costs incurred under paragraph (1) shall be— (A) credited to the fund or account from which amounts were used to pay the costs incurred by the Secretary in carrying out the land exchange; (B) merged with amounts in the fund or account to which the amounts were credited under subparagraph (A)