12 C.F.R. § 1242.3
(a) Enterprise preliminary identification; notice to FHFA; timing.
(2) Each Enterprise shall establish and implement a process to identify each of its core business lines. The process shall include a methodology for evaluating the Enterprise's participation in activities and markets that may be critical to the stability of the national housing finance markets or carrying out the statutory mission and purpose of the Enterprise. The methodology shall be designed, taking into account the nature, size, complexity, and scope of the Enterprise's operations, to identify and assess:
(b) FHFA identification of core business lines; notice to an Enterprise; timing of inclusion in resolution plan.
(c) Reconsideration of business line identification—(1) Reconsideration initiated by an Enterprise.