The certification mark, as intended to be used by authorized persons, is intended to certify that these persons, who are performing the services identified above, have demonstrated satisfactory, advanced professional knowledge in the field of arboriculture, including: proper plant and tree care; identifying, planting, maintaining, monitoring, and treating plants and trees; establishing appropriate growing conditions; and modifying the basic elements of plant growth, in accordance with the requirements to be established by the certifier, including: the satisfaction of professional occupational eligibility requirements; successful completion of a comprehensive examination; and continuing education requirements.