Except as provided in sections 81-3539 to 81-3541, an individual shall not directly or indirectly engage in the practice of geology in the state or use the title Professional Geologist or display or use any words, letters, figures, titles, sign, card, advertisement, or other symbol or device indicating or tending to indicate that he or she is a geologist or is practicing geology unless he or she is licensed under the Geologists Regulation Act. A licensed geologist shall not aid or abet any person not licensed under the act in the practice of geology.