Okla. Stat. tit. 11, § 11-35-102.1: Disposition of proceeds from investment of meter

deposit funds.

The proceeds from any investments of meter deposit funds and any

other earnings therefrom shall be considered to be profit derived

from the investment and shall be placed in the fund from which the

operation and maintenance expenses of the utility, for which the

meter deposits invested were collected, are paid. The investment of

such funds by the municipality shall in no manner impair its

obligation to any person, firm or corporation, to refund in full any

or all deposits theretofore or thereafter made.