IC 22-3-2 through IC 22-3-6 does not apply to railroad employees engaged in train service as: (1) engineers; (2) firemen; (3) conductors; (4) brakemen; (5) flagmen; (6) baggagemen; or (7) foremen in charge of yard engines and helpers assigned thereto. It also does not apply to employees of municipal corporations in Indiana who are members of: (1) the fire department or police department of any such municipality; and (2) a firefighters' pension fund or of a police officers' pension fund, but if the common council elects to purchase and procure worker's compensation insurance to insure said employees with respect to medical benefits under IC 22-3-2 through IC 22-3-6, the medical provisions of IC 22-3-2 through IC 22-3-6 apply to members of the fire department or police department of any such municipal corporation who are also members of a firefighters' pension fund or a police officers' pension fund. Also, certain independent contractor contracts with not-for-profit entities will be exempt.