Participants must be at least the age of majority in the state that classes are being held and hold full time employment in the green industry as a tree worker or arborist, in a hands-on role supporting tree workers or arborists, or other related role in which you use tree worker/arborist equipment on a regular basis. Courses not offered to individuals who do not work in a a tree worker or arborist or supporting tree worker/arborist capacity nor private homeowners or for recreational tree climbing purposes.