; or (B) adjustments to the acreage of the parcels of real property to be exchanged. (d) Payment of costs of conveyance (1) Payment required The Secretary shall require the Post to cover costs to be incurred by the Secretary, or to reimburse the Secretary for such costs incurred by the Secretary, to carry out the land exchange under this section, including survey costs, costs related to environmental documentation, and any other administrative costs related to the land exchange. If amounts are collected from the Secretary in advance of the Secretary incurring the actual costs and the amount collected exceeds the costs actually incurred by the Secretary to carry out the land exchange, the Secretary shall refund the excess amount to the Post. (2) Treatment of amounts received Amounts received as reimbursement under paragraph (1) shall be credited to the fund or account that was used to cover those costs incurred by the Secretary in carrying out the land exchange. Amounts so credited shall be merged with amounts in such fund or account and shall be available for the same purposes, and subject to the same conditions and limitations, as amounts in such fund or account. (e) Description of property The exact acreage and legal description of property to be exchanged under this section shall be determined by surveys satisfactory to the Secretary and the Post. (f) Conveyance agreement The exchange of real property under this section shall be accomplished using a quit claim deed or other legal instrument and upon terms and conditions mutually satisfactory to the Secretary and the Post, including such additional terms and conditions as the Secretary considers appropriate to protect the interests of the United States. (g) Valid existing rights The exchange authorized under this section shall be subject to valid existing rights. (h) Title approval Title to the real property described in subsection (a) and the real property described in subsection (b) to be exchanged under this section shall be in a form acceptable to the