Arizona State Flag
At the end of April, 70% of Arizona voters passed SB 1070, known as the Immigration Law.
The new law mirrors federal law, which already requires aliens (non-citizens) to register and carry their documents with them. The new Arizona law simply states that violating federal immigration law is now a state crime as well. Because illegal immigrants are by definition in violation of federal immigration laws, they can now be arrested by local law enforcement in Arizona.