Fair Pay Act of 2008 - Amends the Civil Rights Act of 1964 to declare that an unlawful employment practice occurs when the aggrieved person knew or should have known that the person was affected by the discriminatory compensation decision or other practice involved. Applies that amendment to claims of compensation discrimination under the Americans with Disabilities Act of 1990 and the Rehabilitation Act of 1973.
Amends the Age Discrimination in Employment Act of 1967 to declare that an unlawful practice occurs when the aggrieved person knew or should have known that the person was affected by the discriminatory compensation decision or other practice involved.