Section 52.12.135 - Interlocal agreements for ambulance services(1) A rural fire protection district organized under this title may enter into a contract pursuant to chapter 39.34 RCW with a contiguous city for the furnishing by the city to the fire protection district or districts of emergency medical services in the form of ambulance services, provided that the contract may not provide for the establishment of any ambulance service that would compete with any existing, private ambulance service. The fire protection district or districts may impose a monthly utility service charge on each developed residential property located in the portion of the fire protection district or districts served pursuant to the contract in an amount equal to the amount imposed by the city on similar city developed residential property. Developed residential property includes single-family residences, apartments, manufactured homes, mobile homes, and trailers available for occupancy for a continuous period greater than thirty days. A fire protection district or districts may contract with the contiguous city or with any other governmental entity pursuant to chapter 39.34 RCW for the billing and collection services related to the monthly utility service charge for ambulance service. A city providing ambulance services to a fire protection district or districts under a contract entered into pursuant to this subsection may charge individuals actually using the ambulance services reasonable rates and charges for the ambulance services.(2) For purposes of this section, "rural" means a population density within the fire protection district or districts as a whole of ten or fewer persons per square mile.