45 CFR §156.1240

1. (a)Premium payment. A QHP issuer must—
   1. (1)Follow the premium payment process established by the Exchange in accordance with § 155.240.
   2. (2)At a minimum, for all payments in the individual market, accept paper checks, cashier's checks, money orders, EFT, and all general-purpose pre-paid debit cards as methods of payment and present all payment method options equally for a consumer to select their preferred payment method.
   3. (3)For payments in the individual market made using a payment method described in paragraph (a)(2) of this section, accept premium payments made by or on behalf of an enrollee in connection with an individual coverage HRA (as described in § 146.123(b) of this subchapter) or qualified small employer health reimbursement arrangement (as described in section 9831(d)(2) of the Internal Revenue Code of 1986, as amended) in which the enrollee is enrolled.
2. (b)[Reserved]