(1) The department may not make a substantive change to the services offered under an approved waiver or to the eligibility requirements or process for waiver participants unless the department:
(a) adopts rules to implement the changes; and
(b) if necessary, submits a waiver amendment to the centers for medicare and medicaid services and receives approval for the change.
(2) (a) For the purposes of this section, "substantive change" means a change that:
(i) reduces, limits, or otherwise establishes caps on the amount or duration of a service; or
(ii) limits a person's ability to access waiver services.
(b) The term includes but is not limited to changes requiring:
(i) preauthorization before a service is provided;
(ii) preauthorization before an individual is placed on the waiting list for services; or
(iii) that services be used within a specific, shorter time period than previously allowed.