|(a) This chapter governs the eligibility requirements for the Medicaid Buy-In Program (MBI), which is authorized under §531.02444 of the Texas Government Code, and which provides Medicaid benefits under the option explained in §1902(a)(10)(A)(ii)(XIII) of the Social Security Act (42 U.S.C. §1396a(a)(10)(A)(ii)(XIII)). All references in this chapter to MBI mean the Medicaid Buy-In Program. (b) MBI is administered by the Texas Health and Human Services Commission (HHSC). All references in this chapter to HHSC mean the Texas Health and Human Services Commission. (c) MBI provides Medicaid benefits to working persons with disabilities, regardless of age, who apply for Medicaid and meet the requirements explained in this chapter. (d) Nothing in these rules shall be construed to violate the maintenance of eligibility requirements of section 5001 of the American Recovery and Reinvestment Act of 2009 (Public Law 111-5) and make eligibility standards, methodologies, or procedures under the Texas State Plan for Medical Assistance (or any waiver under section 1115 of the Social Security Act (42 U.S.C. §1315)) more restrictive than the eligibility standards, methodologies, or procedures, respectively, under such plan (or waiver) that were in effect on July 1, 2008.