SB 1070 requires immigrants to carry registration documents and makes transporting or sheltering illegal immigrants a state crime. The bill was passed in 2010 in Arizona to increase enforcement of immigration laws and deportation of undocumented immigrants. Supporters argued it was needed to address border security and human trafficking issues, while critics argued it would lead to racial profiling and harassment of Hispanics. The bill was also controversial due to its influence on private prison companies and impacts on Arizona's economy, schools, and relationship with Mexico.