Tex. Government Code § 403.121

(a) In the statement required by Article III, Section 49a, of the Texas Constitution the comptroller shall list outstanding appropriations that may exist after the end of the current fiscal year but may not deduct them from the cash condition of the treasury or the anticipated revenues of the next biennium for the purpose of certification. The comptroller shall base the reports, estimates, and certifications of available funds on the actual or estimated cash condition of the treasury and shall consider outstanding and undisbursed appropriations at the end of each biennium as probable disbursements of the succeeding biennium in the same manner that earned but uncollected income of a current biennium is considered in probable receipts of the succeeding biennium. The comptroller shall consider as probable disbursements warrants that will be issued by the state before the end of the fiscal year.

(b) The comptroller shall include in the statement the detailed computations and all other pertinent information that the comptroller considered in arriving at the estimates of anticipated revenues.