Us immigration policy on temporary admissions congressional research service summary us law provides for the temporary admission of various categories of foreign nationals who are known as nonimmigrants nonimmigrants are admitted for a designated period of time and a specific purpose they include a wide range of visitors including . Us immigration policy on temporary admissions summary us law provides for the temporary admi ssion of various categories of foreign nationals who are known as nonimmigrants nonimmigrants are admitted for a designated period of time and a specific purpose they include a wide range of. Pdf us immigration policy on temporary admissions uploaded by alistair maclean us immigration policy on temporary admissions congressional research service summary us law provides for the temporary admission of various categories of foreign nationals who are known as nonimmigrants nonimmigrants are admitted for a designated period of time and a specific purpose they include a wide range of . Us immigration policy on temporary admissions dec 17 2020 posted by judith krantz media publishing text id a45083b3 online pdf ebook epub library temporarily for a specific purpose according to us immigration law nonimmigrants also are referred to as temporary admissions there are more than 70 classes of nonimmigrant admissions including tourists business visitors foreign students h 1b . This policy brief examines the united states complex employment based immigration system which admits foreign workers through five permanent immigration categories and dozens of nonimmigrant visa categories for temporary workers it evaluates the strengths and weaknesses of the current demand driven system and offers recommendations for improvement based on this analysis