Oklahoma constitution
Article X: revenue and taxation
Section 35

(h) The Legislature may provide by law for the creation of regional economic development districts, comprised of two or more municipalities or counties, or a combination of one or more municipalities and counties, and may specify the terms and conditions under which the bonds authorized in this section may be issued by municipalities and counties located within such districts. The provisions of paragraph (f) of this section shall not apply to any bonds issued in accordance with this paragraph unless such provisions are made expressly applicable by law.