29 CFR §18.41

1. (a)By the judge. Upon reasonable notice to the parties, the judge may change the time, date, and place of the hearing.
2. (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. (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. (2)Change in place of hearing. A motion to change the place of a hearing must be filed promptly.