The United States Code is the codification by subject matter of the general and permanent laws of the United States. It is divided by broad subjects into 50 titles and published by the Office of the Law Revision Counsel of the U.S. House of Representatives.
The CFR is the codification of the general and permanent rules and regulations published by the executive departments and agencies of the U.S. federal government. They first appear in the "Federal Register." This link contains the annual editions from 1996 to current.
The Federal Register is the official journal of the U.S. federal government and contains most routine publications and public notices of government agencies. It is published every day except holidays and weekends. This link contains the Federal Register from 1936 to the current edition. For current and up-to-date information, visit: https://www.federalregister.gov/.
The CFR Index and Finding Aids volume is revised once a year as of January 1. It contains: A subject/agency index for rules currently codified in the Code of Federal Regulations (CFR); a list of agency-prepared indexes appearing in individual CFR volumes; a table of laws and Presidential documents cited as authority for regulations currently codified in the CFR; a list of CFR titles, chapters, subchapters, and parts; an alphabetical list of agencies appearing in the CFR.
Users are able to browse CFR Parts Affected from the Federal Register to find final and proposed rules that affect the CFR and have been published in the Federal Register within the past 24 hours, week, month, or within a specific date range.
From the web site: "The U.S. Government Accountability Office (GAO) is an independent, nonpartisan agency that works for Congress. Often called the "congressional watchdog," GAO investigates how the federal government spends taxpayer dollars." Search for reports by keyword or report number.
Oversight.gov is a publicly accessible, searchable website containing the latest public reports from Federal Inspectors General who are members of the Council of the Inspectors General on Integrity and Efficiency (CIGIE).