(1) When any legislation is enacted after June 30, 1993, which is projected in accordance with this section to increase the total adult inmate population or total juvenile population in state correctional facilities, the Legislature shall include in the legislation an estimate of the operating costs resulting from such increased population for the first four fiscal years during which the legislation will be in effect. The estimate shall utilize the amounts estimated in the fiscal note prepared by the Legislative Fiscal Analyst for such legislation and the amounts estimated by the Department of Correctional Services pursuant to this section.
(2) The Department of Correctional Services shall submit its estimate of any such increased operating costs to the Legislative Fiscal Analyst and the budget division of the Department of Administrative Services along with the information it submits to such entities for purposes of preparing a fiscal note for the legislation. The estimate shall include a projection, based on the prior three-year average of data for similar crimes, of the number of additional adult and juvenile inmates or years of additional incarceration expected from the legislation.
(3) The Legislature shall provide by specific itemized appropriation, for the fiscal year or years for which it can make valid appropriations, an amount sufficient to meet the cost indicated in the estimate contained in the legislation for such fiscal year or years. The appropriation shall be enacted in the same legislative session in which the legislation is enacted and shall be contained in a bill which does not contain appropriations for other programs.
(4) Any legislation enacted after June 30, 1993, which does not include the estimates required by this section and is not accompanied by the required appropriation shall be null and void.
(5) For purposes of this section, operating costs shall include only adult inmate and juvenile per diem and medical expenses.