As soon as practicable after the end of each month, or sooner if deemed advisable, there shall be mailed to each interested person at whose request any services have been performed, a claim for payment of moneys due the United States for the services rendered or for the loan or repair of any standards.

[11 FR 14665, Dec. 27, 1946, as amended at 17 FR 221, Jan. 9, 1952; 20 FR 6433, Sept. 1, 1955. Redesignated at 46 FR 47055, Sept. 24, 1981, as amended at 47 FR 3345, Jan. 25, 1982]