collected from the City under paragraph (1) 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 conveyance under subsection (a), the Secretary shall refund the excess amount to the City. (d) Limitation on source of funds The City may not use Federal funds to cover any portion of the costs required to be paid by the City under this section. (e) Description of property The exact acreage and legal description of the property to be conveyed under subsection (a) shall be determined by a survey satisfactory to the Secretary. (f) Additional terms and conditions The Secretary may require such additional terms and conditions in connection with the conveyance under subsection (a) as the Secretary considers appropriate to protect the interests of the United States. F Pilot Programs and Reports 2871. Modification of pilot program on increased use of sustainable building materials in military construction Section 2861 of the National Defense Authorization Act for Fiscal Year 2022 ( Public Law 117–81