(1) In general. Beginning at the time described in
paragraph (b) of this section and subject to
§ 54.9815-2713A, a group health plan, or a health insurance issuer offering group health insurance coverage, must provide coverage for all of the following items and services, and may not impose any cost-sharing requirements (such as a copayment, coinsurance, or a deductible) with respect to those items and services: