SECTION 1. The salaries of the provincial officers shall be adjusted as follows:
(a) In provinces that have obtained an average total revenue of three hundred thousand pesos or more per annum for five consecutive years, the provincial governor shall receive six thousand pesos per annum; the provincial treasurer, five thousand four hundred pesos per annum, and the provincial fiscal, five thousand pesos per annum.
(b) In provinces that have obtained an average total revenue of two hundred thousand pesos or more per annum, but less than three hundred thousand pesos, for five consecutive years, the provincial governor shall receive five thousand pesos per annum; the provincial treasurer, four thousand eight hundred pesos per annum, and the provincial fiscal, four thousand five hundred pesos per annum.
(c) In provinces that have obtained an average total revenue of one hundred and fifty thousand pesos or more per annum, but less than two hundred thousand pesos, for five consecutive years, the provincial governor shall receive four thousand five hundred pesos per annum; the provincial treasurer, four thousand two hundred pesos per annum, and the provincial fiscal, four thousand pesos per annum.
(d) In provinces that have obtained an average total revenue of one hundred thousand pesos or more per annum, but less than one hundred and fifty thousand pesos, for five consecutive years, the provincial governor shall receive four thousand pesos per annum; the provincial treasurer, three thousand six hundred flesos per annum, and the pro vincial fiscal, three thousand five hundred pesos per annum.
(e) In provinces that have obtained an average total revenue of less than one hundred thousand pesos per annum for five consecutive years, the provincial governor shall receive three thousand two hundred pesos per annum; the provincial treasurer, three thousand pesos per annum, and the provincial fiscal, two thousand four hundred pesos per annum: Provided, That the Secretary of the Interior may,; in his discretion, reduce the scale of salaries herein established for any province the average annual revenue of which during the five consecutive years immediately preceding have been excessively below one hundred thousand pesos.