Oklahoma constitution
Article X: revenue and taxation
Section 25

Except the debts specified in sections twenty-three and twenty-four of this article, no debts shall be hereafter contracted by or on behalf of this State, unless such debt shall be authorized by law for some work or object, to be distinctly specified therein; and such law shall impose and provide for the collection of a direct annual tax to pay, and sufficient to pay, the interest on such debt as it falls due, and also to pay and discharge the principal of such debt within twenty-five years from the time of the contracting thereof. No such law shall take effect until it shall, at a general election, have been submitted to the people and have received a majority of all the votes cast for and against it at such election. On the final passage of such bill in either House of the Legislature, the question shall be taken by yeas and nays, to be duly entered on the journals thereof, and shall be: "Shall this bill pass, and ought the same to receive the sanction of the people?"