SECTION 1. Subsection (a) of section 157 of chapter 140 of the General Laws, as appearing in section 32 of chapter 193 of the acts of 2012, is hereby amended by inserting in the first paragraph, in clause (ii), after the word “dog”,  the following words:- unless municipal attack data indicates a specific breed may be deemed dangerous.

                SECTION 2.  Subsection (c) of section 157 of said chapter 140 of the General Laws, as so appearing, is hereby amended by inserting in the last paragraph, after the word “breed”, the following sentence:-

Unless a city or town deems a specific breed to be deemed dangerous through analysis of  municipal attack data and by a majority vote of the city council with the approval of the mayor, in the case of a city with a Plan A, Plan B, or Plan F charter; by a majority vote of the city council, in the case of a city with a Plan C, Plan D, or Plan E charter; by a majority vote of the annual town meeting or a special meeting called for the purpose, in the case of a municipality with a town meeting form of government; or by a majority vote of the town council, in the case of a municipality with a town council form of government.