It is unlawful for any person to remove any protected, heritage or ancestral tree without first securing a tree removal permit. It is unlawful for any person to damage a protected, heritage or ancestral tree, such as damaging over 50% of the critical root zone, tree topping, over-pruning, or chemical poisoning. It is unlawful for a person to continue work or removal of trees when the City Arborist has issued a stop work order.