Okla. Stat. tit. 62 § 57.127
In the event that the payments into the sinking fund in any fiscal year plus the accumulation in such sinking fund are not sufficient to pay the principal and interest due the following July 15 on the State of Oklahoma Building Bonds of 1968, then it shall be the duty of the State Treasurer to pay into said sinking fund from the State of Oklahoma Building Bonds of 1968 Reserve Fund such sum of money as may be necessary to pay said principal and interest. The cigarette tax monies hereinabove pledged to the retirement of the bonds issued hereunder shall constitute the primary revenue dedicated to the payment of the interest on, and the principal of, said bonds, but it is further pledged, for the purchasers, owners and holders of said bonds, that the State of Oklahoma, if and when it shall appear to be necessary, hereby devotes irrevocably to the payment of the interest on, and principal of, said bonds, any monies in the General Revenue Fund of the State of Oklahoma not otherwise obligated, committed or appropriated, and the State Treasurer is directed to apply such General Revenue Fund of the State of Oklahoma for such purpose. The State of Oklahoma further pledges to the purchasers, owners and holders of said bonds that it will, if and when it shall appear to be necessary, impose and collect a tax and devote the proceeds thereof, or so much thereof as may be necessary, for the purpose of paying the principal of and interest on the bonds issued hereunder as they come due. The bonds issued hereunder, and the interest thereon, shall be general obligations of the State of Oklahoma, and the full faith, credit and resources of the State of Oklahoma are pledged to their payment. The Commission is authorized to incorporate on the face of each of the bonds issued under this act pledges, the same or substantially the same as those made herein. The pledges and covenants so made by the Commission shall constitute the commitment of the State of Oklahoma, made in full good faith, in its sovereign capacity, and shall be binding upon said state and the Legislature, officers, instrumentalities and agents thereof, so long as any of the interest on, or principal of, said bonds shall remain outstanding and unpaid. The Commission is authorized to make such other equally-binding covenants and agreements, not inconsistent with this act or Section 38 of Article X of the Oklahoma Constitution, as it deems to be needful and appropriate to the general purpose of effectuating this act.
Okla. Stat. tit. 62, § 57.127