Operational instructions. QHP issuers must follow the transaction rules established by the Exchange in accordance with 155.430(e) of this subchapter.
45 CFR § 156.270
General requirement. A QHP issuer may only terminate enrollment in a QHP through the Exchange as permitted by the Exchange in accordance with 155.430(b) of this subchapter. (See also 147.106 of this subchapter for termination of coverage.)