(a) Each employer shall require a covered employee to submit to a post-accident drug and alcohol test required under §655.44, a random drug and alcohol test required under §655.45, a reasonable suspicion drug and alcohol test required under §655.43, or a follow-up drug and alcohol test required under §655.47. No employer shall permit an employee who refuses to submit to such a test to perform or continue to perform safety-sensitive functions.

(b) When an employee refuses to submit to a drug or alcohol test, the employer shall follow the procedures outlined in 49 CFR Part 40.


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