(a) There is established as a separate fund in the State treasury the budget reserve fund. Except for money deposited into the permanent fund under section 15 of this article, all money received by the State after July 1, 1990, as a result of the termination, through settlement or otherwise, of an administrative proceeding or of litigation in a State or federal court involving mineral lease bonuses, rentals, royalties, royalty sale proceeds, federal mineral revenue sharing payments or bonuses, or involving taxes imposed on mineral income, production, or property, shall be deposited in the budget reserve fund. Money in the budget reserve fund shall be invested so as to yield competitive market rates to the fund. Income of the fund shall be retained in the fund. section 7 of this article does not apply to deposits made to the fund under this subsection. Money may be appropriated from the fund only as authorized under (b) or (c) of this section. (b) If the amount available for appropriation for a fiscal year is less than the amount appropriated for the previous fiscal year, an appropriation may be made from the budget reserve fund. However, the amount appropriated from the fund under this subsection may not exceed the amount necessary, when added to other funds available for appropriation, to provide for total appropriations equal to the amount of appropriations made in the previous calendar year for the previous fiscal year. (c) An appropriation from the budget reserve fund may be made for any public purpose upon affirmative vote of three-fourths of the members of each house of the legislature. (d) If an appropriation is made from the budget reserve fund, until the amount appropriated is repaid, the amount of money in the general fund available for appropriation at the end of each succeeding fiscal year shall be deposited in the budget reserve fund. The legislature shall implement this subsection by law. [Amended 1990]