45 CFR §156.215

1. (a)Standards relative to advance payments of the premium tax credit and cost-sharing reductions. In order for a health plan to be certified as a QHP initially and to maintain certification to be offered in the individual market on the Exchange, the issuer must meet the requirements related to the administration of cost-sharing reductions and advance payments of the premium tax credit set forth in subpart E of this part.
2. (b)[Reserved]