Section 1234.1 - Purpose, scope and reservation of authority(a)Purpose. This part requires securitizers to retain an economic interest in a portion of the credit risk for any residential mortgage asset that the securitizer, through the issuance of an asset-backed security, transfers, sells, or conveys to a third party in a transaction within the scope of section 15G of the Exchange Act. This part specifies the permissible types, forms, and amounts of credit risk retention, and it establishes certain exemptions for securitizations collateralized by assets that meet specified underwriting standards or that otherwise qualify for an exemption.(b)Scope.(1) Effective December 24, 2015, this part will apply to any securitizer that is an entity regulated by the Federal Housing Finance Agency with respect to a securitization transaction collateralized by residential mortgages.(2) Effective December 24, 2016, this part will apply to any securitizer that is an entity regulated by the Federal Housing Finance Agency with respect to a securitization transaction collateralized by assets other than residential mortgages.(c)Reservation of authority. Nothing in this part shall be read to limit the authority of the Director of the Federal Housing Finance Agency to take supervisory or enforcement action, including action to address unsafe or unsound practices or conditions, or violations of law. 79 FR 77765 , Dec. 24, 2014