1. The authority may establish and maintain funds and accounts determined to be necessary to carry out the purposes of the program and shall provide for the funding, administration, investment, restrictions, and disposition of the funds and accounts. The department and the authority may combine administration of the revolving loan funds and cross collateralize the same to the extent permitted by the Clean Water Act, the Safe Drinking Water Act, and other applicable federal law. Moneys appropriated to and used by the authority and department for purposes of paying the costs and expenses associated with the administration of the program shall be administered as determined by the authority and department.
 2. The funds or accounts held by the authority, or a trustee acting on behalf of the authority pursuant to a trust agreement related to the program, shall not be considered part of the general fund of the state, are not subject to appropriation for any other purpose by the general assembly, and in determining a general fund balance shall not be included in the general fund of the state, but shall remain in the funds and accounts maintained by the authority or trustee pursuant to a trust agreement. Funds and accounts held by the authority, or a trustee acting on behalf of the authority pursuant to a trust agreement related to the program, are separate dedicated funds and accounts under the administration and control of the authority and subject to section 16.31.