Section 4 of that part of said Article XLVIII, under the heading “THE REFERENDUM. III. Referendum Petitions. is hereby amended by striking out the words “If such petition filed as aforesaid is completed by filing with the secretary of the commonwealth not later than ninety days after the law which is the subject of the petition has become law the signatures of not less than ten thousand qualified voters of the commonwealth protesting against such law and asking for a referendum thereon, then the secretary of the commonwealth shall submit such law to the people at the next state election, if thirty days intervene between the date when such petition is filed with the secretary of the commonwealth and the date for holding such state election. If thirty days do not so intervene, then it shall be submitted to the people at the next following state election, unless in the meantime it shall have been repealed; and if it shall not be approved by a majority of the qualified voters voting thereon, it shall, at the expiration of thirty days after such election, be thereby repealed; but no such law shall be held to be disapproved if the negative vote is less than thirty per cent of the total number of ballots cast at such state election.” and inserting in place thereof the following: – If such petition filed as aforesaid is completed by filing with the secretary of the commonwealth not later than ninety days after the law which is the subject of the petition has become law a number of signatures of qualified voters equal in number to not less than one and one half per cent of the entire vote cast for governor at the preceding biennial state election protesting against such law and asking for a referendum thereon, then the secretary of the commonwealth shall submit such law to the people at the next state election, if sixty days intervene between the date when such petition is filed with the secretary of the commonwealth and the date for holding such state election. If sixty days do not so intervene, then it shall be submitted to the people at the next following state election, unless in the meantime it shall have been repealed; and if it shall not be approved by a majority of the qualified voters voting thereon, it shall, at the expiration of thirty days after such election, be thereby repealed; but no such law shall be held to be disapproved if the negative vote is less than thirty per cent of the total number of ballots cast at such state election.