Regulations - Rules which are enacted by agencies to create procedures that enforce the authority of statutes. Congress grants the authority to regulate an area of law by statute. The statute empowering the regulation is printed at the beginning of its entry in the Code of Regulations. For example:
How do these work?
HINT: The easiest way to find regulations related to statutes is to go to one of the major platforms such as Westlaw or Lexis and look at the annotated entry for the statute which will likely lead to cases, regulations, etc.
To illustrate a typical regulation, it's helpful to see what they look like. Here I've looked up the regulation for what the product "Turkey Ham" must consist of according the USDA agency.
First is the regulation accessed through the ecfr website and the second, the pdf available on the Federal Register available via govinfo.
Riveting.