(a)
Mayor, Qualifications. The chief executive officer of the city shall be a mayor who shall be elected by the voters of the city at large. Any voter shall be eligible to hold the office of mayor. The mayor shall devote full time to the office and shall not hold any other elective public office.
(b)
Term of Office. The term of office of the mayor shall be 4 years beginning on the first Monday after the first Tuesday in January following the biennial city election where the mayor is chosen and shall continue until a successor is qualified.
(c)
Compensation. The city council shall by ordinance establish an annual salary for the mayor. No ordinance altering the salary of the mayor shall be effective unless it shall have been adopted before the expiration of 18 months following the beginning of the term for which councilors are elected and it provides that the salary is to become effective in January of the year following the next biennial city election.
(d)
Prohibitions. The mayor shall hold no other city office or city employment for which a salary or other emolument is payable from the city treasury. No former mayor shall hold any compensated appointed city office or city employment until 1 year following the date on which the former mayor's city service has terminated. Nothing in this subsection shall prevent a city officer or employee who has vacated a position in order to serve as mayor from returning to the same office or position of city employment held at the time the position was vacated; provided, however, that no such person shall be eligible for any other municipal position until at least 1 year after the termination of service as mayor. Nothing in this subsection shall apply to persons covered under the leave of absence provisions of section 37 of chapter 31 of the General Laws.