32 V.S.A. § 462

(a) Except in the case of funds held by the State in trust, rebates payable to the U.S. Treasury Department in accordance with the provisions of section 476 of this title, or unless otherwise specified by statute, no monies shall be paid out of the Treasury of the State except upon specific appropriation. The Commissioner of Finance and Management shall not issue his or her warrant except as authorized under the provisions of this section. Such warrant shall be the certificate of the Commissioner of Finance and Management that the account covered by the same is approved for payment by the State Treasurer.

(b) All expenditures from enterprise and internal service funds, except those directly resulting from a client-driven demand for products or services, shall be made pursuant to an appropriation. Based on the needs of the programs, the Commissioner of Finance and Management may change authorized spending limits during the course of the year and may anticipate receipts for enterprise and internal service funds.