It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.
United States Code USC : Title 5 - GOVERNMENT ORGANIZATION AND EMPLOYEES § 552 - Public information; agency rules, opinions, orders, records, and proceedings
USC : Title 13 - CENSUS § 301 - Collection and publication
§ 302 - Rules, regulations, and orders
§ 303 - Secretary of Treasury functions
§ 304 - Filing export information, delayed filings, penalties for failure to file
§ 305 - Penalties for unlawful export information activities
§ 306 - Delegation of functions
§ 307 - Relationship to general census law
USC : Title 18 - CRIMES AND CRIMINAL PROCEDURE § 1692 - Foreign mail as United States mail
§ 1693 - Carriage of mail generally
§ 1694 - Carriage of matter out of mail over post routes
§ 1695 - Carriage of matter out of mail on vessels
§ 1696 - Private express for letters and packets
§ 1697 - Transportation of persons acting as private express
§ 1698 - Prompt delivery of mail from vessel
§ 1699 - Certification of delivery from vessel
§ 1700 - Desertion of mails
§ 1701 - Obstruction of mails generally
§ 1702 - Obstruction of correspondence
§ 1703 - Delay or destruction of mail or newspapers
§ 1704 - Keys or locks stolen or reproduced
§ 1705 - Destruction of letter boxes or mail
§ 1706 - Injury to mail bags
§ 1707 - Theft of property used by Postal Service
§ 1708 - Theft or receipt of stolen mail matter generally
§ 1709 - Theft of mail matter by officer or employee
§ 1710 - Theft of newspapers
§ 1711 - Misappropriation of postal funds
§ 1712 - Falsification of postal returns to increase compensation
§ 1713 - Issuance of money orders without payment
§ 1714 - Repealed.
§ 1715 - Firearms as nonmailable; regulations
§ 1716 - Injurious articles as nonmailable
§ 1716A - Nonmailable locksmithing devices and motor vehicle master keys
§ 1716B - Nonmailable plants
§ 1716C - Forged agricultural certifications
§ 1716D - Nonmailable injurious animals, plant pests, plants, and illegally taken fish, wildlife, and plants
§ 1716E - Tobacco products as nonmailable
§ 1717 - Letters and writings as nonmailable
§ 1718 - Repealed.
§ 1719 - Franking privilege
§ 1720 - Canceled stamps and envelopes
§ 1721 - Sale or pledge of stamps
§ 1722 - False evidence to secure second-class rate
§ 1723 - Avoidance of postage by using lower class matter
§ 1724 - Postage on mail delivered by foreign vessels
§ 1725 - Postage unpaid on deposited mail matter
§ 1726 - Postage collected unlawfully
§ 1727 - Repealed.
§ 1728 - Weight of mail increased fraudulently
§ 1729 - Post office conducted without authority
§ 1730 - Uniforms of carriers
§ 1731 - Vehicles falsely labeled as carriers
§ 1732 - Approval of bond or sureties by postmaster
§ 1733 - Mailing periodical publications without prepayment of postage
§ 1734 - Editorials and other matter as “advertisements”
§ 1735 - Sexually oriented advertisements
§ 1736 - Restrictive use of information
§ 1737 - Manufacturer of sexually related mail matter
USC : Title 38 - VETERANS’ BENEFITS § 101 - Definitions
§ 401
§ 403
§ 404
§ 407
§ 408
§ 414
§ 416
§ 3001 - Purposes
§ 3002 - Definitions
§ 3011 - Basic educational assistance entitlement for service on active duty
§ 3201 - Purpose
§ 3219
§ 3403
§ 3406
§ 3621
§ 3622
§ 3626
§ 3632
§ 3633
§ 5001
USC : Title 39 - POSTAL SERVICE § 101 - Postal policy
§ 401 - General powers of the Postal Service
§ 403 - General duties
§ 404 - Specific powers
§ 407 - International postal arrangements
§ 414 - Special postage stamps
§ 416 - Authority to issue semipostals
§ 3001 - Nonmailable matter
§ 3002 - Nonmailable motor vehicle master keys
§ 3002a - Nonmailability of locksmithing devices
§ 3003 - Mail bearing a fictitious name or address
§ 3004 - Delivery of mail to persons not residents of the place of address
§ 3005 - False representations; lotteries
§ 3006 - Repealed.
§ 3007 - Detention of mail for temporary periods
§ 3008 - Prohibition of pandering advertisements
§ 3009 - Mailing of unordered merchandise
§ 3010 - Mailing of sexually oriented advertisements
§ 3011 - Judicial enforcement
§ 3201 - Definitions
§ 3202 - Penalty mail
§ 3203 - Endorsements on penalty covers
§ 3204 - Restrictions on use of penalty mail
§ 3205 - Accounting for penalty covers
§ 3206 - Reimbursement for penalty mail service
§ 3207 - Limit of weight of penalty mail; postage on overweight matter
§ 3208 - Shipment by most economical means
§ 3209 - Executive departments to supply information
§ 3210 - Franked mail transmitted by the Vice President, Members of Congress, and congressional officials
§ 3211 - Public documents
§ 3212 - Congressional Record under frank of Members of Congress
§ 3213 - Seeds and reports from Department of Agriculture
§ 3214 - Mailing privilege of former President; surviving spouse of former President
§ 3215 - Lending or permitting use of frank unlawful
§ 3216 - Reimbursement for franked mailings
§ 3217 - Correspondence of members of diplomatic corps and consuls of countries of Postal Union of Americas and Spain
§ 3218 - Franked mail for survivors of Members of Congress
§ 3219 - Mailgrams
§ 3403 - Matter for blind and other handicapped persons
§ 3404 - Unsealed letters sent by blind or physically handicapped persons
§ 3405 - Markings
§ 3406 - Balloting materials under the Uniformed and Overseas Citizens Absentee Voting Act
§ 3621 - Applicability; definitions
§ 3626 - Reduced rates
§ 3632 - Action of the Governors
§ 3633 - Provisions applicable to rates for competitive products
§ 5001 - Provisions for carrying mail
