THE WORKER IS A PROFESSIONAL PLAYER WORKING ON ORNAMENTAL TREES WITH THE AIM OF KEEPING THEM IN THE BEST HEALTH AND SAFETY SITUATION. SHALL ACT IN ACCORDANCE WITH THE KNOWLEDGE OF ARBORICULTURE, OF THE PROTECTION OF BOTH TREES AND OF THE ENVIRONMENTAL PROTECTION AND OCCUPATIONAL SAFETY STANDARDS. THE TREATMENT OF THE TREES SHALL COMPRISE LÂ OF THE TREES AND THE MAINTENANCE ACCORDINGLY. TREE WORKER IS RESPONSIBLE FOR THE FUNDAMENTAL PRINCIPLES OF GROWTH, FUNCTIONS, STRUCTURE, DEVELOPMENT AND GROWTH STAGES OF A TREE, IN ORDER TO ADOPT THE APPROPRIATE ARBORICOTURAL MEASURES. IT USES PERSONAL PROTECTIVE EQUIPMENT AND DEVICES FOR KILLING. WORK IN TRECLIMBING.