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Oral-fluid drug testing for marijuana has a shorter detection window, up to 72 hours after use, which could increase marijuana use among truckers, experts say. Story by Eric Miller.   

The Drug & Alcohol Clearinghouse-II regulation requires State Driver Licensing Agencies (SDLAs) to remove commercial driving privileges from truck drivers with a “prohibited” status in the Clearinghouse. A driver is considered prohibited if they engaged in drug or alcohol use or refused a drug or alcohol test.