There shall be excepted from classified service of the town:
(a) All officials elected by the voters of the town, and all persons appointed to fill vacancies in such elective positions.
(b) Heads of departments, offices and agencies appointed by the town administrator.
(c) Employees of the school department for whom state certification is required.
(d) Persons engaged by contract to perform special services for the town where such contracts are certified by the personnel board to be for employment which should not be performed by persons in the classified service.
(e) Persons temporarily appointed or designated to make or conduct a special inquiry, investigation or examination, or to perform a special service where such appointment or designation is certified by the personnel board to be for employment which because of its expert nature or character could not or should not be performed by persons in the classified service.
(f) Such temporary seasonal workers paid on an hourly basis as the personnel board may determine.
(g) Persons who in times of public emergency may be appointed special employees.
(h) All members of boards, commissions, and committees.