(a) For the purpose of protecting the rights of litigants in courts within the United States, all property and assets located in the United States in the control of the estate of Mohammad Reza Pahlavi, the former Shah of Iran, or any close relative of the former Shah served as a defendant in litigation in such courts brought by Iran seeking the return of property alleged to belong to Iran, is blocked as to each such estate or person, until all such litigation against such estate or person is finally terminated. This provision shall apply only to such estate or persons as to which Iran has furnished proof of service to the Office of Foreign Assets Control and which the Office has identified in paragraph (b) of this section.(b) [No persons presently listed].(c) The effective date of this section is January 19, 1981, except as otherwise specified after the name of a person identified in paragraph (b) of this section.46 FR 26478, May 13, 1981, as amended at 61 FR 8216, Mar. 4, 1996; 61 FR 15382, Apr. 8, 1996 Secs. 201-207, 91 Stat. 1626, 50 U.S.C. 1701-1706 ; E.O. 12170, 44 FR 65729; E.O. 12205, 45 FR 24099; E.O. 12211, 45 FR 26685; E.O. 12276, 46 FR 7913; E.O. 12279, 46 FR 7919; E.O. 12280, 46 FR 7921; E.O. 12281, 46 FR 7923; E.O. 12282, 46 FR 7925; E.O. 12283, 46 FR 7927, and E.O. 12294, 46 FR 14111