Any applicant may at any time before the commencement of hearing,
voluntarily withdraw his or her application, in which case the action
shall be dismissed without prejudice. After commencement of the hearing
a voluntary dismissal may be taken only with the approval of the Board.
When, at the time set for the hearing or continued hearing on
any application, neither the applicant nor any one on his or her behalf
appears, and no adjournment has been previously requested, the action
may be dismissed without prejudice.