26 C.F.R. § 54.9815-2719AT
Patient protections (temporary)
(a)-(b) [Reserved]
(c) Applicability date. The provisions of this section are applicable to group health plans and health insurance issuers for plan years beginning before January 1, 2022. See also §§ 54.9816-4T through 54.9816-7T, 54.9817-1T, and 54.9822-1T for rules applicable with respect to plan years beginning on or after January 1, 2022.