Amendment in the nature of a substitute sought to: 1) require a plaintiff to establish the "disparate impact" of an employment practice and show a causal connection between the practice and such impact, then the employer would have been required to prove the "business necessity" of such discriminatory practice; 2) provide for "equitable relief" in discrimination cases rather than punitive and compensatory damages provided for in the bill; 3) limit the ability of nonparties to challenge a court decree resolving a claim; 4) limit the statute of limitation provisions only to seniority plans; 5) provide that current law prohibit racial discrimination in all aspects of a private contract; 6) extend Federal employment discrimination law to Congress; and 7) provide that changes made to existent law are effective upon enactment.