A House committee passed legislation Tuesday that would effectively end the administration's controversial "zero tolerance" drug policy in which vehicles have been seized for carrying minute amounts of drugs. The House Merchant Marine and Fisheries Committee passed an amendment to the Coast Guard Drug Enforcement Act of 1988 that would prohibit the Coast Guard from seizing vessels for drugs when the owner had no knowledge they were on board. The amendment, passed by voice vote, also would prohibit the Customs Service from seizing cars and trucks at the nation's borders for drugs when the owner had no knowledge of them. The Coast Guard currently does not have authority to seize passenger vessels, or common carriers, when the owner has no knowledge of drugs on board.