Be it enacted by the Senate and House of Representatives in General Court assembled, and by the authority of the same, as follows:
Section 7 of chapter 239 of the acts of 1897, as amended by chapter 132 of the acts of 1898, is hereby further amended by striking out the first two sentences and inserting in place thereof the following four sentences:- If it shall appear that there is no choice of a mayor, or if the person elected mayor shall refuse to accept the office, or shall die before qualifying, or if a vacancy in said office shall occur within the first year of the mayoral term, the board of aldermen shall forthwith call for a new election and the same proceedings shall be had in all respects as are hereinbefore provided for the election of mayor. Upon the election, the person so elected shall assume office and be sworn to the faithful discharge of their duties, immediately, to complete the unexpired term. In case a vacancy in the office of the mayor shall occur within the second year of the mayoral term, the president of the board of aldermen shall assume the duties of the office of the mayor. Thereafter, upon the certification by the city clerk at the biennial election, the person so elected mayor shall immediately assume the duties of mayor for the remainder of the unexpired term and on the first Monday of January next ensuing be sworn in to the office of mayor to begin their term of office.