All fees and other official monies received by diplomatic missions or consular offices or by the district accounting and disbursing offices provided in section 4225 of this title, may be transmitted through the Department of State for deposit in the United States Treasury, or may be used in payment of salaries, allowances, and current expenses of said missions and offices, under such rules and regulations as the President may from time to time prescribe; the residue, if any, to be transmitted through the Department of State for deposit in the United States Treasury. Section 3302(b) of title 31 is hereby amended.