22 CFR 51.63 - Passports invalid for travel into or through restricted areas; prohibition on passports valid only for travel to Israel.
(a) The Secretary may restrict the use of a passport for travel to or use in a country or area which the Secretary has determined is:
(3) A country or area in which there is imminent danger to the public health or physical safety of United States travelers.
(b) Any determination made and restriction imposed under paragraph (a) of this section, or any extension or revocation of the restriction, shall be published in the Federal Register.
Title 22 published on 2014-04-01
no entries appear in the Federal Register after this date.