(a) The commission is an independent entity established by federal law and governed by the compact and is not an agency of this state or a program, department, or other division of, or administratively attached to, an agency of this state.
(b) The legislature may appropriate money to the commission. Money for the commission may not be appropriated as part of an appropriation for the Texas Commission on Environmental Quality.
(c) The comptroller may:
(1) assign the commission an agency code; and
(2) from funds appropriated to the commission, provide for the reimbursement of a commission member or employee or a person who contracts with the commission for purchases approved by the commission, including state and local sales tax.