Acronym for Code of Federal Regulations, a codification of the regulations enacted by the United States Federal Government as opposed to laws and codes, which are enacted by Congress and signed by the president. Generally such regulations implement powers conferred on a federal agency or the federal government by a federal law or statute. Such regulations when first enacted are published in the Federal Register or Fed. Reg. When considering a regulation in the CFR, the latest edition of a particular title (the number before the letters) should be used, and subsequent editions of the Fed. Reg. should then be checked for any amendments. Finally the regulation should always be reviewed for consistency with the underlying federal law or statutory authority.