An immigrant within any of the following categories is not required to obtain an immigrant visa: (a)Aliens lawfully admitted for permanent residence. An alien who has previously been lawfully admitted for permanent residence and who is not required under the regulations of the Department of Homeland Security to present a valid immigrant visa upon returning to the United States. (b)Alien members of U.S. Armed Forces. An alien member of the U.S. Armed Forces bearing military identification, who has