The chart below summarizes and simplified the regulatory process.
Another way to look at things is here:
The Federal Register, begun in 1936, is the publication where notices of proposed rules are published. Twice per year executive branch agencies publish their proposed rules in the Unified Agenda. The Federal Register is the daily journal of the U.S. government (the executive branch), and the chart below shows the differences between the various places to get Federal Register content.
Final rules are codified in the Code of Federal Regulations (CFR). CFR is published annually, and FR is published daily. The bridge between FR and CFR is LSA (List of CFR Sections Affected), as shown in the chart below.
All charts on this page are © Christopher C. Brown