Okla. Const. art. VI, § 11

Every bill which shall have passed the Senate and House of Representatives, and every resolution requiring the assent of both branches of the Legislature, shall, before it becomes a law, be presented to the Governor; if he approve, he shall sign it; if not, he shall return it with his objections to the house in which it shall have originated, who shall enter the objections at large in the Journal and proceed to reconsider it. If, after such reconsideration, two-thirds of the members elected to that house shall agree to pass the bill or joint resolution, it shall be sent, together with the objections, to the other house, by which it shall likewise be reconsidered; and, if approved by two-thirds of the members elected to that house, it shall become a law, notwithstanding the objections of the Governor. In all such cases, the vote in both houses shall be determined by yeas and nays, and the names of the members voting shall be entered on the Journal of each house respectively. If any bill or resolution shall not be returned by the Governor within five days (Sundays excepted) after it shall have been presented to him, the same shall be a law in like manner as if he had signed it, unless the Legislature shall, by their adjournment, prevent its return, in which case it shall not become a law without the approval of the Governor. No bill shall become a law after the final adjournment of the Legislature, unless approved by the Governor within fifteen days after such adjournment.