---
kind: "section"
citation: "31 C.F.R. § 553.303"
title: "31"
number: "553.303"
heading: "Effective date."
url: "https://uscodex.org/cfr/31/553.303"
---

# §553.303. Effective date.

- (a) The term effective date refers to the effective date of the applicable prohibitions and directives contained in this part as follows:
  - (1) With respect to a person whose property and interests in property are blocked pursuant to § [553.201(a)(1)](/cfr/31/553.201.md?p=a-1), [12](/cfr/31/12.md):01 a.m. eastern daylight time, May 13, 2014; and
  - (2) With respect to a person whose property and interests in property are otherwise blocked pursuant to [§ 553.201](/cfr/31/553.201.md), the earlier of the date of actual or constructive notice that such person's property and interests in property are blocked.
- (b) For the purposes of this section, constructive notice is the date that a notice of the blocking of the relevant person's property and interests in property is published in the Federal Register.

## Notes

### Amendments

[87 FR 58974, Sept. 29, 2022, as amended at 91 FR 46840, July 27, 2026]

### Authority

Authority: 3 U.S.C. 301; 31 U.S.C. 321(b); 50 U.S.C. 1601 et seq., 1701 et seq.; 22 U.S.C. 287c; Pub. L. 101-410, 104 Stat. 890, as amended (28 U.S.C. 2461 note); E.O. 13667, 79 FR 28387, 3 CFR, 2014 Comp., p. 243.

### Source

Source: 87 FR 58974, Sept. 29, 2022, unless otherwise noted.

### Amendments

[87 FR 58974, Sept. 29, 2022, as amended at 91 FR 46840, July 27, 2026]