One of the better known quirks of Delaware practice is the requirement of association with "Delaware Counsel." This requirement is more stringent than any other jurisdiction that I know of, requiring a Delaware lawyer to sign and file all papers in the action:
Association with Delaware counsel required. Unless otherwise ordered, an attorney not admitted to practice by the Supreme Court of the State of Delaware may not be admitted pro hac vice in this Court unless associated with an attorney who is a member of the Bar of this Court and who maintains an office in the District of Delaware for the regular transaction of business (“Delaware counsel”). Consistent with CM/ECF Procedures, Delaware counsel shall be the registered users of CM/ECF and shall be required to file all papers. Unless otherwise ordered, Delaware counsel shall attend proceedings before the Court.
Although the requirement itself is generally well known, the highlighted clause is fairly obscure, and ...