Each landscape architect, upon registration, shall obtain a seal of the design authorized by the department, bearing the name of the registrant, number of certificate or license, and the legend "South Carolina Registered Landscape Architect". The seal may be used only while the registrant's certificate or license is in full force and effect. Certificates of registration, licenses, and identification cards must be signed by the chairman of the department and the secretary of the council. Nothing in this chapter may be construed to authorize the use or acceptance of the seal of the landscape architect in lieu of the seal of an architect, engineer, or land surveyor.