Electronic Code of Federal Regulations, Office of the Federal Register
Maintains the text in forceThe continuously updated edition of the federal regulations, with an API that renders a single section as HTML at an address naming the title, part and section. Each page states the date the text is current to.
Maintains the current text of the law as amended, so you can read a provision as it stands today rather than reconstructing it from amendments.
www.ecfr.govCannot be cited for
The eCFR is an editorial compilation and is not the official legal edition: the annual Code of Federal Regulations and the daily Federal Register are. A regulation says nothing about the statute's own exceptions, and most of what a reader wants from federal immigration practice is in neither - it is in agency manuals and in state law.
Re-check every
90 days
Publication rhythm
Updated daily as rules are published in the Federal Register.
Re-check triggers
an amendment to the customer identification rule at 31 CFR 1020.220 · a change to the personal exemptions in 19 CFR part 148