After January 1, 2016, every sales tax levy submitted to county voters for approval shall embrace but one subject, which shall be clearly expressed on the ballot. For purposes of this section, "one subject" shall mean a ballot proposition with only one sales tax levy for a specified purpose but may include multiple projects for that purpose. Nothing in this section shall be interpreted as prohibiting a one-subject proposition from residing upon the same paper voting ballot as other one-subject propositions.
Okla. Stat. tit. 68, § 1354.36