42 CFR § 447.506 - Authorized generic drugs.
(a) Definitions. For the purpose of this section, the following definitions apply:
(b) Inclusion of authorized generic drugs in AMP by a primary manufacturer. The primary manufacturer must include in its calculation of AMP its sales of authorized generic drugs that have been sold or licensed to a secondary manufacturer, acting as a wholesaler for drugs distributed to retail community pharmacies, or when the primary manufacturer holding the NDA sells directly to a wholesaler.
(c) Inclusion of authorized generic drugs in best price by a primary manufacturer. A primary manufacturer holding the NDA must include the best price of an authorized generic drug in its computation of best price for a single source or an innovator multiple source drug during a rebate period to any manufacturer, wholesaler, retailer, provider, HMO, non-profit entity, or governmental entity in the United States, only when such drugs are being sold by the manufacturer holding the NDA.
(d) Inclusion of authorized generic in AMP and best price by a secondary manufacturer. The secondary manufacturer of an authorized generic drug must provide a rebate based on its sales of authorized generics, and must calculate AMP and best price, consistent with the requirements specified in §§ 447.504 and 447.505.