31 CFR § 541.302 - Effective date.
The term effective date refers to the effective date of the applicable prohibitions and directives contained in this part as follows:
(a) Except as set forth in paragraph (c) of this section, with respect to a person whose property and interests in property are blocked pursuant to § 541.201(a)(1):
(1) As a result of being listed in the Annex to Executive Order 13391 of November 22, 2005, and except as provided in paragraph (a)(3) of this section, 12:01 a.m. eastern standard time on November 23, 2005;
(2) As a result of initially being listed in the Annex to Executive Order 13288 of March 6, 2003, and subsequently being listed in the Annex to Executive Order 13391 of November 22, 2005, 12:01 a.m. eastern standard time on March 7, 2003; or
(3) As a result of a determination pursuant to section 1(b) of Executive Order 13288 of March 6, 2003, as originally issued, regardless of whether the person was subsequently listed in the Annex to Executive Order 13391 of November 22, 2005, the earlier of the date of actual or constructive notice that such person's property and interests in property are blocked;
(b) Except as set forth in paragraphs (a) and (c) of this section, with respect to a person whose property and interests in property are otherwise blocked pursuant to § 541.201(a), the earlier of the date of actual or constructive notice that such person's property and interests in property are blocked; and
(c) With respect to the prohibition in § 541.201, as further explained in § 541.408, on the making of donations of articles, such as food, clothing, and medicine, intended to be used to relieve human suffering by, to, or for the benefit of persons whose property and interests in property are blocked pursuant to § 541.201(a), the later of the effective date as set forth in paragraphs (a) and (b) of this section and 12:01 a.m. eastern standard time on November 23, 2005.