<P> The contemporary period of required passports for Americans under United States law began on November 29 , 1941 . A 1978 amendment to the Immigration and Nationality Act of 1952 made it unlawful to enter or depart the United States without an issued passport even in peacetime . </P>
<P> The contemporary period of required passports for Americans under United States law began on November 29 , 1941 . A 1978 amendment to the Immigration and Nationality Act of 1952 made it unlawful to enter or depart the United States without an issued passport even in peacetime . </P>
when were passports required to enter the us
when were passports required to enter the us
1978
1978