Designated employer representative (DER). An employee authorized by the employer to take immediate action to remove employees from safety-sensitive duties, or cause employees to be removed from these covered duties, and to make required decisions in the testing and evaluation processes. The DER also receives test results and other communications for the employer, consistent with the requirements of this part. Service agents cannot act as DERs.
49 CFR § 40.3
In this part, the terms listed in this section have the following meanings: