1. At the next municipal election in all cities and towns under special charters and having three thousand inhabitants and not more than ten thousand inhabitants, except as allowed in subsection 2 of this section, and at each municipal election thereafter, there shall be elected a mayor, a councilman at large, one councilman from each ward, a constable, an attorney, a treasurer, who shall be, by virtue of the treasurer’s office, collector of the revenue of such city, an auditor, and a clerk, who shall hold their respective offices for two years, and until their successors are elected and qualified. And the city council shall provide by ordinance for the election for the election or appointment of the following officer, to wit: An assessor; except that the governing bodies of cities in counties of the first class under a charter form of government which have attained a population of more than three thousand and less than ten thousand inhabitants subsequent to the granting of its special charter, may by ordinance provide that the terms of its original special charter relating to municipal officers, their election and terms shall continue in force notwithstanding the provisions of this section.

2. At the next municipal election in all cities and towns under special charters with at least three thousand inhabitants and not more than ten thousand inhabitants and located in a county of the first or second classification that adjoins a county of the first classification with a charter form of government, the city council may place the question of whether the city council shall be allowed to appoint municipal offices, other than a mayor, a councilman at large and one councilman from each ward. The city council shall provide by ordinance the ballot language to be submitted to the voters. Upon approval by a majority of the qualified voters in such city or town voting on the question, the city council shall be allowed to appoint the specified offices.