43 U.S.C. § 377

The cost and expense after June 30, 1945 , of the office of the Commissioner in the District of Columbia, and, except for such cost and expense as are incurred on behalf of specific proj­ects, of general investigations and of nonproj­ect offices outside the District of Columbia, shall be charged to the reclamation fund and shall not be charged as a part of the reimbursable construction or operation and maintenance costs.