(B) There is hereby created in the state treasury the services fund for individuals with mental illness. On the death of the beneficiary of a trust created pursuant to section 5815.28 of the Revised Code, the portion of the remaining assets of the trust specified in the trust instrument shall be deposited to the credit of the fund. Money credited to the fund shall be used for individuals with mental illness. Supplemental services may be provided through the department or boards of alcohol, drug addiction, and mental health services. In accordance with Chapter 119. of the Revised Code, the department of mental health and addiction services may adopt any rules necessary to implement this section.