(S. 3219) Clean Air Act Amendments. The vote is on the Bentsen amendment to reduce the performance warranty on auto emissions control devices from 5 years or 50,000 miles to 18 months or 18,000 miles. This would make the citizen rather than the auto companies bear the burden of paying for the maintenance and repair costs of the auto emission controls that are used to reduce air pollution. Conservationists opposed the amendment because it would reduce public cooperation inspection program to make sure that these devices were working. July 28, 1976. Rejected 45-51. The correct vote is no.