In order to safeguard life, health and property and to promote public welfare, by requiring that only properly qualified persons shall practice architecture, engineering and landscape architecture, or use the title “registered interior designer” in this state, any person practicing architecture, engineering or landscape architecture or using the title “registered interior designer” shall be registered as provided in this chapter, and it is unlawful for any person to practice or offer to practice architecture, engineering or landscape architecture, or use the title “registered interior designer” unless the person has been duly registered under this chapter, except as otherwise provided.