Answer:
a 2010 legislative Act in the U.S. state of Arizona that at the time of passage in 2010 was the broadest and strictest anti–illegal immigration measure passed in the United States.[2] It has received international attention and has spurred considerable controversy.[3][4]
U.S. Federal law requires aliens older than 18 to possess any certificate of alien registration issued to him or her at all times; violation of this requirement is a federal misdemeanor crime.[5] The Arizona act additionally made it a state misdemeanor crime for an alien to be in Arizona without carrying the required documents,[6] and required that state law enforcement officers attempt to determine an individual's immigration status during a "lawful stop, detention or arrest" when there is reasonable suspicion that the individual is an illegal immigrant.[7][8] The law barred state or local officials or agencies from restricting enforcement of federal immigration laws,[9] and imposed penalties on those sheltering, hiring and transporting unregistered aliens.[10] The paragraph on intent in the legislation says it embodies an "attrition through enforcement" doctrine.[11][12]
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