Okla. Const. art. X, § 26

(a) Except as herein otherwise provided, no county, city, town, township, school district, or other political corporation, or subdivision of the state, shall be allowed to become indebted, in any manner, or for any purpose, to an amount exceeding, in any year, the income and revenue provided for such year without the assent of three-fifths of the voters thereof, voting at an election, to be held for that purpose, nor, in cases requiring such assent, shall any indebtedness be allowed to be incurred to an amount, including existing indebtedness, in the aggregate exceeding five percent (5%) of the valuation of the taxable property therein, to be ascertained from the last assessment for state and county purposes previous to the incurring of such indebtedness: Provided, that if a school district has an absolute need therefor, such district may, with the assent of three-fifths of the voters thereof voting at an election to be held for that purpose, incur indebtedness to an amount, including existing indebtedness, in the aggregate exceeding five percent (5%) but not exceeding ten percent (10%) of the valuation of the taxable property therein, to be ascertained from the last assessment for state and county purposes previous to the incurring of such indebtedness, for the purpose of acquiring or improving school sites, constructing, repairing, remodeling or equipping buildings, or acquiring school furniture, fixtures or equipment; and such assent to such indebtedness shall be deemed to be a sufficient showing of such absolute need, unless otherwise provided by law. Provided further, that if a city or town has an absolute need therefor, such city or town may, with the assent of three-fifths of the voters thereof voting at an election to be held for that purpose, incur indebtedness to an amount, including existing indebtedness, in the aggregate exceeding five percent (5%) but not exceeding ten percent (10%) of the valuation of the taxable property therein, to be ascertained from the last assessment for state and county purposes previous to the incurring of such indebtedness, and such assent to such indebtedness shall be deemed to be a sufficient showing of such absolute need unless otherwise provided by law. Provided, further, that any county, city, town, school district, or other political corporation, or subdivision of the state, incurring any indebtedness requiring the assent of the voters as aforesaid, shall, before or at the time of doing so, provide for the collection of an annual tax sufficient to pay the interest on such indebtedness as it falls due, and also to constitute a sinking fund for the payment of the principal thereof within twenty-five (25) years from the time of contracting the same, and provided further that nothing in this section shall prevent, under such conditions and limitations as shall be prescribed by law, any school district from contracting with:

(1) certificated personnel for periods extending one (1) year beyond the current fiscal year; or

(2) a school superintendent for periods extending more than one (1) year, but not to exceed three (3) years beyond the current fiscal year.

(b) If a county approves an exemption of household goods of the heads of families and livestock employed in support of the family from ad valorem taxation pursuant to the provisions of subsection (b) of Section 6 of this article, the percentage limitations on indebtedness as specified in subsection (a) of this section for political subdivisions or political corporations located in any such county shall be adjusted by multiplying the percentage levels specified in subsection (a) of this section by the millage adjustment factor as specified in subsection (b) of Section 8A of this article.

(c) If approved by the people, the amendment to this section shall become effective January 1, 1993.