The short version
- The DER receives the MRO's verified result, including which drug a positive was verified for, but not the quantitative values or the employee's medical explanation, which stay with the MRO (49 CFR 40.163)
- The DER removes an employee from safety-sensitive duty when the rule requires it, and may not stand an employee down on a pending laboratory report (49 CFR 40.21)
- The DER must be an employee of the employer. A service agent may perform administrative tasks and relay information the employer elects to receive through it, but may never act as the DER or make testing, removal, or refusal decisions (49 CFR 40.3, 40.345, 40.355)
- A DER support line gives the person in the role someone to call on a hard decision
