The annual rental of all armories and buildings not owned by the Commonwealth and occupied by any organization of the Pennsylvania military forces, the Pennsylvania National Guard and the Pennsylvania guard, shall be paid by the State Treasurer in the manner provided by law. All payments for light, heat, water and janitor services in rented armories and buildings shall be made by the department upon properly itemized vouchers, except where the services are furnished by the landlord under the rental contract.
51 Pa.C.S. § 1508