Federal agency regulations and other official agency notices are originally published, 5 days a week, in the Federal Register. The regulations are then codified in the Code of Federal Regulations where they are listed by agency. Both the Federal Register and the CFR are available free from the federal government and from publishers like Lexis and Westlaw. See also FDsys, the next generation of Government information online.
Select Cases from "Voting Rights and Election Law" by Michael Dimino