49 CFR §382.119

1. (a)Employers are prohibited from standing employees down, except consistent with a waiver from the Federal Motor Carrier Safety Administration as required under this section.
2. (b)An employer subject to this part who seeks a waiver from the prohibition against standing down an employee before the MRO has completed the verification process shall follow the procedures in 49 CFR 40.21. The employer must send a written request, which includes all of the information required by that section to the Administrator, Federal Motor Carrier Safety Administration, 1200 New Jersey Ave., SE., Washington, DC 20590-0001.
3. (c)The final decision whether to grant or deny the application for a waiver will be made by the Administrator or the Administrator's designee.
4. (d)After a decision is signed by the Administrator or the Administrator's designee, the employer will be sent a copy of the decision, which will include the terms and conditions for the waiver or the reason for denying the application for a waiver.
5. (e)Questions regarding waiver applications should be directed to the Federal Motor Carrier Safety Administration, Office of Safety Programs (MC-SS), 1200 New Jersey Ave., SE., Washington, DC 20590-0001.