From the ACLU: (.pdf)
H.R. 2831, which addresses wage disparity based on race, color, religion, sex, national origin, age, and disability, clarifies that such discrimination is not a one-time occurrence that starts and ends with a pay decision, but that each paycheck represents a continuing violation by the employer. Critically, this legislation will ensure employers do not profit from years of discrimination simply because their employees were unaware of it. Far from imposing a new rule on employers, however, reversing the Ledbetter decision would restore Congress' legislative intent, as well as the law that prevailed in the majority of federal circuits and at the EEOC before the Supreme Court's ruling. It reaffirms the fundamental principle that our civil rights protections are intended to have a road remedial purpose - to make persons whole for injuries suffered because of unlawful employment discrimination. American workers should know that they are protected from wage discrimination and are able to challenge such discrimination no matter how long it takes them to discover it.
The ACLU strongly urges you to vote in support this legislation.
Contact your congressperson and urge them to vote for this legislation.