Under FAA rules, is supervisory training required only once or reoccurring?

FAQ Category: FAA Drug Alcohol Testing

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It is required once and also reasonable reoccurrent training required.  More on FAA drug & alcohol testing regulations – https://www.nationaldrugscreening.com/faa-regulation-49/  Supervisor training (drugs): One-hour of training is required on the specific, contemporaneous physical, behavioral, and performance indicators of probable drug use. In addition, supervisors must receive employee training as defined above.