Alabama constitution
Article XI: taxation and finance
Section 213.34

All bonds issued pursuant to this amendment (including refunding bonds) may be sold at public or private sale, with or without competitive bidding, to such person or persons, at such price or prices and upon such terms as the governor, the director of finance and the state treasurer shall determine to be in the best interests of the state. All such bonds (including refunding bonds) shall be direct, general obligations of the state, and the full faith and credit of the state are hereby irrevocably pledged for the prompt and faithful payment of the principal of said bonds and the interest and premium (if any) thereon.