Okla. Stat. tit. 26, § 26-1-102: Primary elections

A Primary Election shall be held on the third Tuesday in June of

each even-numbered year, at which time each political party

recognized by the laws of this state shall nominate its candidates

for the offices to be filled at the next succeeding General Election

unless otherwise provided by law. No candidate’s name shall be

printed upon the General Election ballot unless such candidate shall

have been nominated as herein provided, unless otherwise provided by

law; provided further that this provision shall not exclude the

right of a nonpartisan candidate to have his or her name printed

upon the General Election ballots. No county, municipality or

school district shall schedule an election on any date during the

twenty (20) days immediately preceding the date of any such primary

election.