Okla. Stat. tit. 82, § 564
The secretary shall be the custodian of the records of the district and of its corporate seal and shall assist the board in such particulars as it may direct in the performance of its duties. It shall be the duty of the secretary to attest, under the corporate seal of the district, all certified copies of the official records and files of the district that may be required of him by the provisions of this Act, or by any person ordering the same and paying the reasonable cost of transcription and any portion of the record so certified and attested shall be prima facie evidence of the facts therein contained. The secretary shall serve also as treasurer of the district, unless a treasurer is otherwise provided for by the board. The board may also employ and discharge a chief engineer who may be an individual, co-partnership or corporation, or a member of the board of directors, who is a civil engineer may be designated as chief engineer of the district; an attorney; and such other engineers, attorneys and other agents and assistants as may be useful and necessary; and may provide for their compensation, which, with all other necessary expenditures, shall be taken as a part of the cost of the improvement. The employment of the secretary, treasurer, chief engineer and attorney for the district shall be evidenced by agreements in writing, which, so far as possible, shall specify the amounts to be paid for their services and be approved by the court, having jurisdiction of the proceedings. The chief engineer shall be superintendent of all the works and improvements, and shall make a full report to the board each year, or oftener if required by the board, and may make such suggestions and recommendations to the board as he may deem proper.
Laws 1923-24, HB 47, c. 139, § 12.