Section 373.3 - Base risk retention requirement(a)Base risk retention requirement. Except as otherwise provided in this part, the sponsor of a securitization transaction (or majority-owned affiliate of the sponsor) shall retain an economic interest in the credit risk of the securitized assets in accordance with any one of §§ 373.4 through 373.10 . Credit risk in securitized assets required to be retained and held by any person for purposes of compliance with this part, whether a sponsor, an originator, an originator-seller, or a third-party purchaser, except as otherwise provided in this part, may be acquired and held by any of such person's majority-owned affiliates (other than an issuing entity).(b)Multiple sponsors. If there is more than one sponsor of a securitization transaction, it shall be the responsibility of each sponsor to ensure that at least one of the sponsors of the securitization transaction (or at least one of their majority-owned or wholly-owned affiliates, as applicable) retains an economic interest in the credit risk of the securitized assets in accordance with any one of §§ 373.4 , 373.5 , 373.8 , 373.9 , or 373.10 .