"The Equal Pay Act of 1963 is a U.S. law that prohibits employers from paying different wages to men and women who work under similar conditions and whose jobs require the same level of skill, effort, and responsibility" (Investopedia).
The Fair Labor Standards Act (FLSA) is a federal law which establishes minimum wage, overtime pay eligibility, recordkeeping, and child labor standards affecting full-time and part-time workers in the private sector and in federal, state, and local governments (Washington Office of Financial Management).
"The Immigration Reform and Control Act altered U.S. immigration law by making it illegal to hire illegal immigrants knowingly and establishing financial and other penalties for companies that employed illegal immigrants. The act also legalized most undocumented immigrants who had arrived in the country prior to January 1, 1982" (Wikipedia).
"The Uniformed Services Employment and Reemployment Rights Act (USERRA) is a federal law, passed in 1994, that protects military service members and veterans from employment discrimination on the basis of their service, and allows them to regain their civilian jobs following a period of uniformed service." (U.S. Office of Special Counsel)