Okla. Stat. tit. 34 § 17
It shall be the duty of the Secretary of State, not less than five (5) business days before any election held throughout the state at which any proposed law, part of an act, or amendment to the constitution is to be submitted to the people of the state for their approval or rejection, to cause to be published once in two different newspapers of general statewide circulation and in a newspaper of general circulation in each county, a copy of all ballots on initiated and referred questions, measures, and constitutional amendments, and an explanation of how to vote for or against propositions. The Secretary of State shall designate the newspapers in which the publication shall be made. The publication shall be paid for at the legal rate for other publications, out of any funds of the state appropriated therefor.
Okla. Stat. tit. 34, § 17