Okla. Stat. tit. 26, § 26-14-112.1: Materials to accompany ballot

Said ballots must be accompanied by:

1. A plain opaque envelope in which voted ballots must be

placed by the voter;

2. An envelope bearing an affidavit stating that the voter is

qualified to vote, that he has personally marked the ballots or has

directed a person chosen by the voter to mark the ballots in

accordance with the provisions of Section 7-123.3 of this title; and

3. A return envelope addressed to the secretary of the county

election board.