Authority for conversion to underground facilities; formation of assessment district. (1) A public authority shall have the power to require the conversion of overhead electric or communication facilities to underground facilities; to provide and receive funds to pay for such conversion; and to assess the whole or any part of the cost thereof against the real property included in the underground assessment district specially benefited by such conversion

(2) An underground assessment district shall include an area having a frontage of not less than 400 feet upon a public street, road or highway along which overhead electric or communication facilities are located.

(3) An underground assessment district:

(a) Created by a city, may include area along city streets, county roads and state highways or any part thereof located within the district.

(b) Created by a county, may include areas along county roads, state highways or any part thereof located within the district. [1969 c.385 §3]