The Department of Transportation released a proposed rule to allow oral fluid testing for regulated employees. The proposed rule means employers would have the option of using urine testing or oral fluid.
One of the reasons shared for including oral fluids as a testing method is that, if the data around the windows of detection is accurate, testing oral fluid may "provide employers with a method for detecting recent use of marijuana" as its window of detection for marijuana is up to 24 hours after use vs. urine testing's window of detection is 3 to 67 days.
DOT is taking comments on the accuracy of the detection window and general comments about the proposed rule until March 30.