Oklahoma constitution
Article V: legislative power
Section 58

No act shall take effect until ninety days after the adjournment of the session at which it was passed, except enactments for carrying into effect provisions relating to the initiative and referendum, or a general appropriation bill, unless, in case of emergency, to be expressed in the act, the Legislature, by a vote of two-thirds of all members elected to each House, so directs. An emergency measure shall include only such measures as are immediately necessary for the preservation of the public peace, health, or safety, and shall not include the granting of franchises or license to a corporation or individual, to extend longer than one year, nor provision for the purchase or sale of real estate, nor the renting or encumbrance of real property for a longer term than one year. Emergency measures may be vetoed by the Governor, but such measures so vetoed may be passed by a three-fourths vote of each House, to be duly entered on the journal.