Ind. Code § 8-1-11.2-3

Sec. 3. Such city shall not be obligated to pay for any utility service furnished it by the operation of utility property acquired under this chapter except according to and by virtue of such agreement, if any, as may be made therefor between the board of directors for utilities of the department of public utilities of such city, on the one part, and said city by its mayor, city controller, and board of public works, on the other part.