(a) The purpose of this subchapter is to interpret and implement Insurance Code §§1271.157, 1271.158, 1275.052, 1275.053, 1301.164, 1301.165, 1551.229, 1551.230, 1575.172, 1575.173, 1579.110, and 1579.111; and Insurance Code Chapter 1467.(b) Section 21.4903 of this title is only applicable to a covered nonemergency health care or medical service or supply provided by:(1) a facility-based provider that is not a participating provider for a health benefit plan, if the service or supply is provided at a health care facility that is a participating provider; or(2) a diagnostic imaging provider or laboratory service provider that is not a participating provider for a health benefit plan, if the service or supply is provided in connection with a health care or medical service or supply provided by a participating provider.