§ 26 O.S. § 26-1-102Primary 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.