Okla. Stat. tit. 19 § 901.42
The board shall hold a public hearing on the proposed budget no later than fifteen (15) days prior to the beginning of the budget year. Notice of the date, time and place of the hearing, together with the proposed budget summaries, shall be published in a newspaper of general circulation in the district not less than five (5) days before the date of the hearing. Affidavit and proof of publication shall be attached to the budget when filed with the county clerk and State Auditor and Inspector. The district shall make available a sufficient number of copies of the proposed budgets as the board shall determine and have them available for review or for distribution or sale at the office of the district. At the public hearing on the budgets, any person may present to the board comments, recommendations or information on any part of the proposed budget.
Okla. Stat. tit. 19, § 901.42