There is hereby created in the state treasury a special nonreverting fund to be known as the Behavioral Health and Developmental Services Trust Fund to enhance and ensure for the coming years the quality of care and treatment provided to individuals receiving public mental health, developmental, and substance abuse services. The Fund shall be established on the books of the Comptroller. Notwithstanding the provisions of § 2.2-1156, the Fund shall consist of the net proceeds of the sale of vacant buildings and land held by the Department. The Fund shall also consist of such moneys as shall be appropriated by the General Assembly and any private donations. Interest earned on moneys in the Fund shall remain in the Fund and be credited to it. Any moneys remaining in the Fund, including interest thereon, at the end of each fiscal year shall not revert to the general fund but shall remain in the Fund. Moneys in the Fund shall be used solely for the purposes set forth in this article. Expenditures and disbursements from the Fund shall be made by the State Treasurer on warrants issued by the Comptroller upon written request signed by the Commissioner.