SEC. 10. Notwithstanding the provisions of section 561 of the Administrative Code, no officer or employee of the any Insular Government shall be paid any allowance, directly or indirectly, for the use of his own automobile on official business, except the following: (a) those employed under Act No. 3431; (b) officers of the Federal Government assigned for service in the Office of the Governor-General; (c) the Secretaries and Undersecretaries of Department; (d) the chairman of the Senate Committee on Accounts; (e) the secretary and assistant secretaries to the Governor-General; (f) Directors and Assistant Directors of bureaus and offices; (g) district commanders, inspectors and provincial commanders of the Philippine Constabulary; (h) superintendents of schools assigned in the provinces; (i) the chief of the division of metropolitan sanitation and the chief of the division of provincial sanitation of the Philippine Health Service; (j) the secretary and assistant secretary of the Senate and the secretary to the President of the Senate; (k) the secretary and assistant secretary of the House of Representatives, and the secretary to the Speaker of the House of Representatives: Provided, however, That the automobile allowance authorized in this Act is subject to the regulations regarding the payment of such allowance: And provided, further, That the rate of automobile allowance shall be determined by the proper Head of Department but it shall not exceed P75 per month.