Okla. Stat. tit. 70, § 1210.213

A. The use of a tobacco product or vapor product shall be prohibited in or on an educational facility that offers an early childhood education program or in which children in grades kindergarten through twelve are educated. The use of a tobacco product or vapor product shall also be prohibited in school vehicles, and at any school-sponsored or school-sanctioned event or activity. B. Nothing in this section shall be construed to prohibit a public school district or private school from having more restrictive policies regarding tobacco products and vapor products in or on an educational facility, in school vehicles and at any school-sponsored or school-sanctioned event or activity.