The government renewed warnings that the process wouldn't lead to citizenship or give them permission to travel internationally. It will begin accepting immigrants' applications today.
The paperwork for the program, known as Deferred Action for Childhood Arrivals, can be downloaded from the U.S. Citizenship and Immigration Services website, said the agency's director, Alejandro Mayorkas. Applicants must pay a $465 fee and provide proof of identity and eligibility.
The Associated Press contributed to this report.