Question: When did the united states start regulating immigration?
Disambiguated questions and answers: question: When did the united states introduce in the House the first bill that ended up regulating immigration?
When did the united states' first bill which started regulating immigration get signed into law?
answer: April 12, 1882
May 6, 1882
Natural Questions answer: 1790 (from the Wikipedia article "History of laws concerning immigration and naturalization in the United States")