Equal Pay Act of 1963
In 1942, Republican congresswoman Winifred C. Stanley from Buffalo, N.Y. introduced H.R. 5056, Prohibiting Discrimination in Pay on Account of Sex, which did not pass at the time. The issue languished until 10 June 1963, when Congress passed the Equal Pay Act ("EPA" or the "Act") as an amendment to the Fair Labor Standards Act, to "prohibit discrimination on account of sex in the payment of wages by employers."
Equal pay for equal work
Massachusetts, California, and New York City have adopted laws which prohibit employers from asking about salary history to determine the salary that will be offered for a new job. This is intended to narrow the gender pay gap by reducing the impact of past discrimination. Many other U.S. states were considering similar laws, as of May 2017.