(a) Consolidation. Two or more proceedings involving a common question of law or fact may be joined for hearing of any or all the matters in issue or may be consolidated by order of the Administrative Law Judge. The Administrative Law Judge may make such rulings concerning the conduct of such proceedings as may tend to avoid unnecessary costs or delay.

(b) Separate Hearings. The Administrative Law Judge, for the convenience of the parties, to avoid prejudice, or to expedite final resolution of the issues, may order a separate hearing of any claim or issue, or grant a separate hearing to any respondent.