LR 83.10 and LCrR 57.10 require an attorney not residing or maintaining a principal office in the Northern District of Texas to designate local counsel (unless exempt by LR 83.11 or LCrR 57.11). See also Judicial Panel on Multidistrict Litigation Rule 2.1(c). A member of the bar of the Northern District of Texas who resides or maintains a principal office in this district and whose residence or principal office is located within 50 miles of the courthouse in the division in which the case is pending may serve as local counsel. Local counsel must be authorized to present and argue the client's position at any hearing called by the Court and to perform any duty required by the local rules of the Northern District of Texas.