1.    A city planning to expand water service through annexation shall develop a city water service area plan. The city shall consult with any other water service provider, including a district, whose water service area is affected by the city’s water service area plan of the establishment of the plan.

2.    The city shall file the city water service area plan with the commission. Upon filing of the plan with the commission, the city may proceed with water service to the annexed area as provided in section 61-35-26. A city water service area plan is enforceable when there is a water service agreement among the water service providers, including a district, that are encompassed by or which abut the water service area boundary.

3.    Sections 61-35-26.1 through 61-35-26.4 do not supersede an existing water service agreement between a city and a district.