12 C.F.R. § 1240.122 – Ongoing qualification.

(a) Changes to advanced systems. An Enterprise must meet all the minimum requirements in § 1240.121 on an ongoing basis. An Enterprise must notify FHFA when the Enterprise makes any change to an advanced system that would result in a material change in the Enterprise's advanced approaches total risk-weighted asset amount for an exposure type or when the Enterprise makes any significant change to its modeling assumptions.
(b) Failure to comply with qualification requirements.
1. (1) If FHFA determines that an Enterprise fails to comply with the requirements in § 1240.121, FHFA will notify the Enterprise in writing of the Enterprise's failure to comply.
2. (2) The Enterprise must establish and submit a plan satisfactory to FHFA to return to compliance with the qualification requirements.
3. (3) In addition, if FHFA determines that the Enterprise's advanced approaches total risk-weighted assets are not commensurate with the Enterprise's credit, market, operational, or other risks, FHFA may require such an Enterprise to calculate its advanced approaches total risk-weighted assets with any modifications provided by FHFA.