Md. Code, Business Occupations and Professions § 9–403

(a) Except as provided in subsection (b) of this section, a corporation, partnership, or limited liability company shall hold a permit issued by the Board before the corporation, partnership, or limited liability company may operate a business through which landscape architecture is practiced.

(b) A corporation, partnership, or limited liability company may provide landscape architectural services for itself or for an affiliated corporation, partnership, or limited liability company without a permit issued by the Board.