In localities where there are two or more tow car services, officers shall distribute tow car service calls on an equitable basis by an established "Tow Car Rotation System." The "Tow Car Rotation System" must be used when all tow car services are approximately the same distance from services requested. In establishing the rotation system officers must be assured by the participating agencies that:
Mont. Admin. r. 23.3.405
44-1-103 MCA;