(a) Voluntary withdrawal. At any time, a party that initiated a proceeding may request a voluntary withdrawal by filing and serving a motion to dismiss that confirms the party's intention to voluntarily withdraw from the proceeding. A party's voluntary withdrawal is effective when the ALJ issues an order of dismissal.

(b) Stipulated dismissal. When all parties to a proceeding agree and stipulate to the dismissal of a proceeding, they may file and serve a joint motion to dismiss. The stipulated dismissal is effective when the ALJ issues an order dismissing the proceeding.