54 U.S.C. § 312507

1. (a)To carry out this chapter, any Federal agency responsible for a construction project may assist the Secretary or may transfer to the Secretary funds as may be agreed on, but not more than 1 percent of the total amount authorized to be appropriated for the project, except that the 1 percent limitation under this section shall not apply if the cost of the project is $50,000 or less. The costs of the survey, recovery, analysis, and publication shall be deemed nonreimbursable project costs.
2. (b)Amounts appropriated for purposes of this section shall remain available until expended.