What is the fine-grained topic of the following text: Only the large, low hanging moss should be removed; the smaller, low-hanging moss will not be removed; the film arborist must use an instrument approved by Park and Tree to remove the moss; no tree limbs may be damaged in any way while removing the moss; the location manager and a Park & Tree arborist must be onsite during any removal of moss. Only return the topic.
Moss removal regulations for film arborists in a park