SECTION 75.
Said section 3 of said chapter 44B, as so appearing, is hereby further amended by striking out, in lines 28 to 30, inclusive, the words "or (3) for $100,000 of the value of each taxable parcel of residential real property" and inserting in place thereof the following words:-
(3) for $100,000 of the value of each taxable parcel of residential real property; or
(4) for $100,000 of the value of each taxable parcel of class three, commercial property, and class four, industrial property as defined in section 2A of said chapter 59.