Cases may be consolidated on the motion of any party, on the Judge's own motion, or on the Commission's own motion, where there exist common parties, common questions of law or fact or in such other circumstances as justice or the administration of the Act require. [51 FR 32015, Sept. 8, 1986; 52 FR 13831, Apr. 27, 1987; 52 FR 19631, May 26, 1987]