Rule 90. Attorneys

(a) Requirement. -- Except as provided in Supreme Court Rules 55-57 and Rule 90.1 of these Rules, only members of the Bar of the Supreme Court of this State currently entitled to practice in that Court who:

(1) Maintain an office in Delaware for the practice of law, or

(2) who maintain an office outside of Delaware and have a Delaware address (which is not a post office box) shall be entitled to practice as an attorney in this Court.

(b) Withdrawal. -- No appearance by an attorney shall be withdrawn except upon motion and order of the Court, which motion and order of the Court shall be noted on the docket of the cause of action. Appearances may also be made in any other manner as shall be prescribed or allowed by statute, rules, or administrative order.

(c) Agreements between attorneys. -- Agreements between attorneys will not be considered by the Court unless they are in writing and filed with the clerk or stated in the presence of the Court.