Federal Reserve bank notes redeemed by the Treasurer of the United States under shall be charged against the balance of deposits for the retirement of Federal Reserve bank notes under the provisions of sections 122 and 445  of this title; and charges for Federal Reserve notes redeemed by the Treasurer of the United States under shall be apportioned among the twelve Federal Reserve banks as determined by the Board of Governors of the Federal Reserve System.section 121a of this title1section 121a of this title