29 C.F.R. § 18.41

(a) By the judge. Upon reasonable notice to the parties, the judge may change the time, date, and place of the hearing.

(b) By a party's motion. A request by a party to continue a hearing or to change the place of the hearing must be made by motion.

(1) Continuances. A motion for continuance must be filed promptly after the party becomes aware of the circumstances supporting the continuance. In exceptional circumstances, a party may orally request a continuance and must immediately notify the other parties of the continuance request.

(2) Change in place of hearing. A motion to change the place of a hearing must be filed promptly.