Except as provided in section 81-8,206, an individual shall not directly or indirectly engage in the practice of landscape architecture in this state or use the title of professional landscape architect or display or use any words, letters, figures, titles, signs, cards, advertisements, or other symbols or devices indicating or tending to indicate that he or she is a professional landscape architect or is practicing landscape architecture unless he or she is licensed under the Professional Landscape Architects Act. A licensee shall not aid or abet any person not licensed under the act in the practice of landscape architecture.