The chapter implements the requirements for training and evaluating the competency of nurse aides employed in nursing facilities that participate in Medicaid, Medicare, or both, and for maintaining a registry of nurse aides, required by §1819(b)(5) and §1919(b)(5) of the Social Security Act; the Code of Federal Regulations, Title 42, §§483.150-483.154; and Texas Health and Safety Code, Chapter 250.