12 USC 1141d1 - Interest rates on loans made from revolving fund

Interest rates in excess of the rates set forth in notes or other obligations taken by the Federal Farm Board or the Farm Credit Administration for loans made from the revolving fund authorized by section 1141d of this title shall not be charged or collected on any of said loans, whether such loans have been heretofore or are hereafter paid in whole or in part, except that in those cases where a borrower by specific contract has agreed to pay a higher rate of interest, the contract rate shall be charged for the period agreed upon; and the amount of any interest collected in excess of the rates thus set forth or contracted for shall be refunded out of said fund or credited on the borrowers indebtedness.