Guidance

You are here

Interim Final Rule on Procedures for Transportation Workplace Drug and Alcohol Testing Programs

About this Document

Change in instructions to labs and MROs with respect to adulterated, substituted and dilute specimen results.

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact
Submit Feedback >