Q. how do you cite the Federal code?

The Bluebook style is not used to cite legal periodical articles or books. Use the regular APA style.

The basic elements of an APA Style reference for a regulation are drawn from the Code of Federal Regulations.

1. Name of the regulation. Start the reference with the name of the regulation if the regulation is commonly identified by its name. You can include the abbreviated name of the agency that issued the regulation as part of the name (e.g., FDA Prescription Drug Advertising Rule).
2. Title number. The Code of Federal Regulations is divided into numbered titles. Include that number in the reference. If the reference doesn’t begin with the regulation’s name, then the title number is the first element of the reference.
3. Abbreviated name of the source. Use the abbreviation C.F.R. for the Code of Federal Regulations.
4. Section number. For a single section number, use the section symbol (§) and the section number in the reference. For a range of section numbers, use a doubled section symbol (§§) before the numbers and separate the numbers with an en dash.
5. End the reference with the edition year of the Code of Federal Regulations.
6. Add the URL if the regulation is available online.

Government regulation examples:

Format:

Name of Regulation, Title number and Source Abbreviation §  xxx (Year). 

Example:

Financial Assistance to Zombies, 45 C.F.R. § 234 (2020).

Title number and Source Abbreviation §  xxx (Year). 

7 C.F.R. § 319 (2000).