Must service agents comply with DOT drug and alcohol testing requirements?

Must service agents comply with DOT drug and alcohol testing requirements? § 40.341

(a) As a service agent, the services you provide to transportation employers must meet the requirements of this part and the DOT agency drug and alcohol testing regulations.

(b) If you do not comply, DOT may take action under the Public Interest Exclusions procedures of this part (see Subpart R of this part) or applicable provisions of other DOT agency regulations.