Immigration Reform and Control Act (IRCA) of 1986
Public Law 99-603 (Act of 11/6/86), which was passed in order to control and deter illegal immigration to the United States. Its major provisions stipulate legalization of undocumented aliens who had been continuously unlawfully present since 1982, legalization of certain agricultural workers, sanctions for employers who knowingly hire undocumented workers, and increased enforcement at U.S. borders.
Source: U.S. Citizenship and Immigration Services