Okla. Stat. tit. 19 § 1716
Within fifteen (15) days after the filing of any district budget with the State Auditor and Inspector, any taxpayer may file protests against any alleged illegality of the budget in the manner provided by this section and Sections 24103 through 24111 of Title 68 of the Oklahoma Statutes. The fifteen-day protest period begins upon the date the budget is received in the Office of the State Auditor and Inspector. After receipt of a taxpayer protest, the State Auditor and Inspector shall transmit by certified mail one copy of each protest to the district, and one copy of each protest to the county treasurer and the excise board of each county in which the district is located. The taxpayer protest shall specify the alleged illegality in the budget and the grounds upon which the alleged illegality is based. Any protest filed by any taxpayer shall inure to the benefit of all taxpayers. If no protest is filed by any taxpayer within the fifteen-day period, the budget and any appropriations thereof shall be deemed legal and final until amended by the board or the county excise board as authorized by law. Taxpayers shall have the right at all reasonable times to examine the budget on file with the board, the county excise board or the State Auditor and Inspector for the purpose of checking illegalities in the budget or for filing protests in accordance with this section and Sections 24103 through 24111 of Title 68 of the Oklahoma Statutes.
Okla. Stat. tit. 19, § 1716