Get access to Public Laws and significant committee reports from 1944 to the present. Look in the annual volume for Public Laws and for Legislative History.
http://www.justice.gov/crt/about/osc/ - The Office of Special Counsel for Immigration-Related Unfair Employment Practices (OSC) enforces the anti-discrimination provision (§ 274B) of the Immigration and Nationality Act (INA), 8 U.S.C. § 1324b.