Okla. Stat. tit. 11, § 11-37-124: Joint construction and operation of waterworks -

Election.

Any municipality may conduct an election, in the manner provided

by law for municipal elections, for the purpose of securing approval

of the registered voters within its corporate limits to enter into a

contract with any other municipality to finance the construction,

maintenance, control and operation of waterworks necessary to

provide such municipalities with an adequate supply of water for

public purposes.