(a) General rule.--On the effective date of an optional plan adopted pursuant to this subpart, all appointive offices then existing in such municipality shall be abolished and the terms of all appointed officers shall immediately cease and terminate. This section does not abolish the office or terminate the terms of office of any alderman or constable or of any official or employee now protected by any tenure of office or civil service law or of any police officer or firefighter whether or not protected by a tenure of office law.
(b) Use of resolution to govern interim proceedings.--Provisions for officers and for the organization and administration of the municipal government under the optional plan may be made by resolution pending the adoption of ordinances, but any such resolution shall expire not later than 60 days after the effective date of the optional plan.