During a state of war emergency a state of emergency or a local emergency the governing body shall:
(a) Ascertain the damage to the political subdivision and its personnel and property. For this purpose it shall have the power to issue subpoenas to compel the attendance of witnesses and the production of records.
(b) Proceed to reconstitute itself by filling vacancies until there are sufficient officers to form the largest quorum required by the law applicable to that political subdivision. Should only one member of the governing body or only one standby officer be available, that one shall have power to reconstitute the governing body.
(c) Proceed to reconstitute the political subdivision by appointment of qualified persons to fill vacancies.
(d) Proceed to perform its functions in the preservation of law and order and in the furnishing of local services.