The governing body of any municipality is hereby authorized to continue, in accordance with the provisions of this act, operation of any emergency medical service or ambulance service or centralized emergency service communications system previously established, operated and maintained, or continue any contract with any person, other municipality or board of a county hospital for the furnishing of emergency medical services or ambulance service previously executed, pursuant to the authority of any statute repealed by this act. Such governing body is hereby authorized to continue to levy under authority of this section any tax for the operation and maintenance of such services or contracts previously authorized and levied pursuant to any statute repealed by this act in any amount not exceeding the amount specified in the ordinance or resolution providing for the levy in such municipality under such repealed statute. No increase in the amount of the tax previously authorized for the operation and maintenance of such services or contracts shall be levied until the governing body of such municipality adopts a new ordinance or resolution which authorizes such increase and is subject to referendum in accordance with the provisions of subsection (c) of Kan. Stat. Ann. § 65-6113.