Maryland Corporations and Associations Section 7-103

      In addition to any other activities which may not constitute doing intrastate business in this State, for the purposes of this article, the following activities of a foreign corporation do not constitute doing intrastate business in this State:

            (1)      Maintaining, defending, or settling an action, suit, claim, dispute, or administrative or arbitration proceeding;

            (2)      Holding meetings of its directors or stockholders or carrying on other activities which concern its internal affairs;

            (3)      Maintaining bank accounts;

            (4)      Maintaining offices or agencies for the transfer, exchange, and registration of its securities;

            (5)      Appointing and maintaining trustees or depositaries with respect to its securities;

            (6)      Transacting business exclusively in interstate or foreign commerce; and

            (7)      Conducting an isolated transaction not in the course of a number of similar transactions.