Whenever any measure shall be initiated by the people in the manner provided by law, or whenever the referendum shall be demanded against any measure passed by the Legislature, same shall be submitted to the people for their approval or rejection at the next regular election; provided, the Governor shall have power, in his discretion, to call a special election to vote upon such questions, or to designate the mandatory primary election as a special election for such purpose.
Okla. Stat. tit. 34, § 25