No fees other than those prescribed in the Schedule of Fees, § 22.1, or by or pursuant to an act of Congress, shall be charged or collected by officers of the Foreign Service for official services performed abroad (22 U.S.C. 1201). All fees received by any officer of the Foreign Service for services rendered in connection with the duties of office or as a consular officer shall be accounted for and paid into the Treasury of the United States (22 U.S.C. 99 and 812). For receipt, registry, and numbering provisions, see § 22.5(b). Collections for transportation and other expenses necessary for performance of services or for Interested Party toll telephone calls shall be refunded to post allotment accounts and made available for meeting such expenses.