Statute 28 CFR § 600.3 - Qualifications of the Special Counsel …
Statute law is a written form of public law or private law that is passed by a legislative body. It can be said that every statute is a law, but not every law is a statute.
https://constitutionus.com/law/what-is-statutory-law/
A regulation is not a statute. Congress never passed this CFR Section 600.