---
kind: "section"
citation: "50 C.F.R. § 217.181"
title: "50"
number: "217.181"
heading: "Effective dates."
url: "https://uscodex.org/cfr/50/217.181"
---

# §217.181. Effective dates.


Regulations in this subpart are effective from April 20, 2026, through April 19, 2031.


## Notes

### Source

Source: 91 FR 20852, Apr. 17, 2026, unless otherwise noted.

### Authority

Authority: 16 U.S.C. 1361 et seq., unless otherwise noted.

### Source

Source: 74 FR 35143, July 20, 2009, unless otherwise noted.