(a) Every registered landscape architect shall have a reproducible seal, which may be computer generated, the impression of which shall contain the name of the registered landscape architect, the registered landscape architect’s registration number, and the words “Registered Landscape Architect, State of Illinois”. The registered landscape architect shall be responsible for his or her seal and signature as defined by rule.
     (b) Notwithstanding the requirements of this Section, an architect, land surveyor, professional engineer, or structural engineer licensed by the Department shall be permitted to affix his or her seal to any plans, specifications, and reports prepared by or under his or her supervision in connection with the incidental practice of landscape architecture.