e-CFR Navigation Aids


Simple Search

Advanced Search

 — Boolean

 — Proximity


Search History

Search Tips


Latest Updates

User Info


Agency List

Incorporation By Reference

eCFR logo

Related Resources

Electronic Code of Federal Regulations

We invite you to try out our new beta eCFR site at https://ecfr.federalregister.gov. We have made big changes to make the eCFR easier to use. Be sure to leave feedback using the Feedback button on the bottom right of each page!

UPDATED MAY 13, 2021

Click Here for List of Recent Update Pages

Effective regulations inserted from the above-dated Federal Register:

45 CFR 1173

47 CFR 74

Regulations linked from the above-dated Federal Register:

18 CFR 157

40 CFR 52

42 CFR 483

Regulations delayed, withdrawn, or extended in the above-dated Federal Register:

20 CFR 655, 656 Regulation at 86 FR 3672, Jan. 14, 2021 delayed until Nov. 14, 2021

Effective dates that expire on this date:


Regulations inserted that were previously linked and became effective on the date listed above:

17 CFR 1, 4 (86 FR 19419, Apr. 13, 2021)

17 CFR 41, 190 (86 FR 19421, Apr. 13, 2021)

Need assistance?