Section 548.305 - 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 § 548.201(a)(1) , 12:01 a.m. eastern daylight time, June 19, 2006;(2) With respect to a person whose property and interests in property are otherwise blocked pursuant to § 548.201 , the earlier of the date of actual or constructive notice that such person's property and interests in property are blocked; and(3) With respect to transactions prohibited by § 548.202 , the earlier of the date of actual or constructive notice of such prohibition.(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, or notice of a prohibition pursuant to § 548.202 , is published in the FEDERAL REGISTER.