Okla. Stat. tit. 70, § 70-24-131: Orders to leave school buildings and grounds

The superintendent or principal of any secondary, middle or

elementary school shall have the authority to order any person out

of the school buildings and off the school property when it appears

that the presence of such person is a threat to the peaceful conduct

of school business and school classes. This authority shall extend

to the removal of any individual attending an official school

activity or field trip where students are present, including an

activity or field trip not on school property, when the

superintendent or principal determines that a threat to the peaceful

conduct of students exists. Any person who refuses to leave after

being ordered to do so by the superintendent or principal shall be

guilty of a misdemeanor and upon conviction thereof shall be

punished by a fine of not more than Five Hundred Dollars ($500.00)

or by imprisonment in the county jail for not more than ninety (90)

days, or by both such fine and imprisonment.