"Sec. 1675.    Salaries of provincial fiscal. — The provincial fiscals shall receive the salaries hereinbelow fixed:

"(a)    In first class A provinces six thousand six hundred pesos.

"(b)    In first class B provinces, six thousand three hundred pesos.

"(c)    In first class provinces, six thousand pesos.

"(d)    In second class provinces, five thousand seven hundred pesos.

"(e)    In third class provinces, five thousand one hundred pesos.

"(f)    In fourth class provinces, four thousand eight hundred pesos.

"(h)    In all other provinces below the fifth class the salary should be three thousand six hundred pesos per annum.

"Provided, That vacancies left by provincial fiscals who retired or may retire under Act Numbered Two thousand five hundred and eighty-nine, entitled 'An Act providing for a gratuity by reason of retirement to officers and employees of the Philippine Government who have rendered satisfactory service during six continuous years or more, and for other purposes,' or any other retirement Act that may hereafter be enacted, shall be filled in accordance with the provision of this section."