22 U.S.C. § 1631j
No property or proceeds shall be returned under this subchapter, nor shall any payment be made or judgment awarded in respect of any property vested in any officer or agency designated by the President under this subchapter unless satisfactory evidence is furnished to said designee, or the court, as the case may be, that the aggregate of the fees to be paid to all agents, attorneys at law or in fact, or representatives, for services rendered in connection with such return or payment or judgment does not exceed 10 per centum of the value of such property or proceeds or of such payment. Any agent, attorney at law or in fact, or representative, believing that the aggregate of the fees should be in excess of such 10 per centum may, in the case of any return of, or the making of any payment in respect of, such property or proceeds by the President or such officer or agency as he may designate, petition the district court of the United States for the district in which he resides for an order authorizing fees in excess of 10 per centum and shall name such officer or agency as respondent. The court hearing such petition or a court awarding any judgment in respect of any such property or proceeds, as the case may be, shall approve an aggregate of fees in excess of 10 per centum of the value of such property or proceeds only upon a finding that there exist special circumstances of unusual hardship which require the payment of such excess. Any person accepting any fee in excess of an amount approved under this section, or retaining for more than thirty days any portion of a fee, accepted prior to such approval, in excess of the fee as approved, shall be guilty of a violation of this subchapter.
22 U.S.C. § 1631j