Costs allocation for common-interest parties: a single set of costs or fees applies when matters are joined unless court orders otherwise. When two or more petitions or applications raise a common issue and are heard together and decided by a common judgment, only one set of costs shall be allowed to all parties who have a common interest, unless the Court otherwise orders; similarly, where different parties in the same proceeding have a common interest, only one set of fees shall be allowed to them together even if represented by different advocates, unless the Court otherwise orders.