This bill amends Section 1408 of Title 10 of the Oklahoma Statutes, which pertains to definitions related to Medicaid home- and community-based services. Key modifications include an updated definition of "individual with intellectual disability," which now specifies that such individuals must have an IQ of less than seventy or an IQ between seventy-one and seventy-five accompanied by a verbal or performance IQ score of seventy or below. The age limit for manifestation of these disabilities has been extended from eighteen to twenty-two years. Additionally, the bill introduces new criteria for assessing limitations in mental functioning, aligning with the Social Security Administration's standards.

The bill also revises the definition of "developmental disability" to clarify that it does not include individuals who are mentally incompetent due to mental illness. The term now encompasses a range of severe, chronic disabilities that manifest before the age of twenty-two and result in substantial functional limitations in major life activities. Furthermore, the bill ensures that individuals receiving services as of September 1, 1991, remain eligible for those services, while allowing the Department of Human Services to provide programs for individuals with developmental disabilities who are not currently served. The act is set to take effect on November 1, 2026.