Okla. Stat. tit. 63 § 1-224
An election to authorize a levy under the provisions of the preceding section may be called by the board of county commissioners, in its official discretion. Such election may also be called by initiative petition filed with the county clerk, signed by sixteen percent (16%) of the legal voters of the county, such percent to be based upon the total number of votes cast at the last general election in the county for the state office receiving the highest number of votes at such election in the county. Whenever the election is called by either method, the board of county commissioners shall fix the date for the election and shall cause to be published in at least one issue each week, for four (4) weeks, of a newspaper having general circulation in the county, a notice stating that the election has been called, the date and purpose of the election, and the number of mills on the dollar of assessed valuation of the county to be voted upon; and the notice may contain any other information believed appropriate by the board. The election shall be conducted by the county election board, in the same manner as elections to select county officers, and the cost of holding the election shall be paid from county funds. The secretary of the county election board shall certify the results of the election to the board of county commissioners, and after receiving such certification the board of county commissioners shall notify the county excise board if the levy shall have been approved.
Okla. Stat. tit. 63, § 1-224