Maryland Corporations and Associations Section 5-117
§ 5-117.
  (a)   A majority of the directors and all of the officers of a professional corporation, except the secretary and treasurer, must be qualified persons with respect to the corporation.
  (b)   Whether or not organized as a close corporation under Title 4 of this article:
    (1)   The number of directors in a professional corporation may be less than 3;
    (2)   The officers of a professional corporation may be limited to president, treasurer, and secretary and an individual may hold more than one office; and
    (3)   Notwithstanding any other provision of law, an individual who holds more than one office in a professional corporation may act in more than one capacity to execute, acknowledge, or verify any instrument required to be executed, acknowledged, or verified by more than one officer.