Unilateral communication with a Judge about the merits of a pending case by attorneys, litigants, and law enforcement personnel is prohibited, except in these cases where legitimate ex parte application is permitted Attorneys shall explain this rule to their clients and will direct them to refrain from communicating in any manner with the Judge concerning pending or prospective litigation. No attorney shall deliver to the Judge any letter, memorandum, or brief in any pending case without concurrently delivering a copy to opposing counsel.