The Controlled Access Zone is four metres from any power line, and designates the area which must only be entered by a Unison-approved person.
If any part of a tree is within the Controlled Access Zone (four metres from any power line), an approved contractor must be used to cut or trim that tree.
The tree in this illustration will need to be cut or trimmed as it is inside the Growth Limit Zone. It is also within the Controlled Access Zone, so a Unison-approved person must be used to safely trim the tree.
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