(a) The commission shall develop and oversee the implementation of consumer direction models under which an individual with a disability or an elderly individual who is receiving certain state-funded or Medicaid-funded services, or the individual's legally authorized representative, exercises control over:
(1) developing and implementing the individual's service plan; or
(2) the persons who directly deliver the services.
(b) The consumer direction models the commission establishes under this subchapter may be implemented in appropriate and suitable commission or health and human services agency programs.