Okla. Stat. tit. 82, § 82-668: Payment of monies due United States from master

conservancy districts - Levies and assessments.

All payments to become due to the United States under any

federal contract entered into between a master conservancy district

and the United States may be paid from revenues or derived from

assessments upon the real property of the district, as provided in

the Conservancy Act. It shall be the duty of the board of directors

of a contracting district, pursuant to the provisions of the

Conservancy Act, to make and establish all levies, assessments,

tolls or charges to meet each year the contract indebtedness and

obligation as the same may be provided for in any federal contract

heretofore or hereafter entered into by a contracting district and

to do any and all acts necessary to carry out the provisions of any

such federal contract.