# 547.303 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 § 547.201(a)(1), 12:01 a.m. eastern standard time on October 30, 2006; and(2) With respect to a person whose property and interests in property are otherwise blocked pursuant to § 547.201(a), 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*.[83 FR 57312, Nov. 15, 2018]