The Department may accept funds, grants, and services from public and private sources to carry out its powers and duties. The Department may charge reasonable fees for services and products. The fees charged may not exceed the cost of providing the service or product. All fees collected under this subsection shall be credited to a continuing nonlapsing fund that is not subject to § 7-302 of this article. Subject to the appropriation process in the State budget, the Department shall use the fund for the costs of operating. The State Treasurer shall hold and the State Comptroller shall account for the fund. The fund shall be invested and reinvested in the same manner as other State funds. Investment earnings accrue to the benefit of the fund.