Section 1. Section nineteen hundred and thirty-two of the Revised Administrative Code is hereby amended to read as follows:
"Sec. 1932. Inspection districts and compensation of inspectors of the Bureau of Posts.— Each province, including all chartered cities adjoining it or situated within its boundaries, shall for administrative purposes constitute one inspection district of the Bureau of Posts, except the City of Manila which shall constitute one district. Each of those districts shall be in charge of an inspector of the said Bureau, who shall receive compensation in accordance with the following scale:
"(a) For the City of Manila, four thousand five hundred pesos per annum.
"(b) For first-class provinces, four thousand five hundred pesos per annum.
"(c) For second-class provinces, three thousand nine hundred sixty pesos per annum.
"(d) For third-class provinces, three thousand seven hundred twenty pesos per annum.
"(e) For fourth-and fifth-class provinces, three thousand four hundred eighty pesos per annum.
"There shall be assigned in the City of Manila ten assistant inspectors, whose salaries shall be three thousand one hundred twenty pesos per annum each.
"There shall be six supervising inspectors, whose salaries shall be five thousand one hundred pesos per annum each, and whose duties shall be to supervise the work of the district inspectors and assistant inspectors and perform such other duties as may be required of them from time to time by the Director of Posts. As immediate head of all the inspectors, one chief supervising inspector with a salary of five thousand four hundred pesos per annum is authorized."