Creates the Substance Use Disorder Residential and Detox Rate Equity Act. Requires the General Assembly to appropriate sufficient funds to the Department of Human Services, for State Fiscal Year 2024 and for each State fiscal year thereafter, to ensure reimbursement rates will be increased and subsequently adjusted upward by an amount equal to the Consumer Price Index-U from the previous year, not to exceed 5% in any State fiscal year, for licensed or certified community-based substance use disorder treatment providers under community service grant programs for persons with substance use disorders, including, but not limited to, certain residential and withdrawal management services provided in accordance with criteria established by the American Society of Addiction Medicine. Effective immediately.