Okla. Stat. tit. 26, § 26-4-119: Change of political affiliation

Any registered voter may make application under oath to change

political affiliation by executing a form prescribed by the

Secretary of the State Election Board at any time. The county

election board secretary in the applicant's county of residence

shall process and approve any such application for political

affiliation change upon receipt, except as provided in Section 4-

110.1 of this title and except during the period from April 1

through August 31, inclusive, in any even-numbered year. The

secretary shall process and approve such applications for change of

political affiliation received or postmarked from April 1 through

August 31 in any even-numbered year after August 31.