It shall be unlawful for any person to:
A. Damaging: Damage, mutilate or destroy any public tree;
B. Attaching: Attach any device or structure (i.e., tree houses, lights) to or on public trees, except as may be authorized by the City Forester by duly promulgated rule or regulation;
C. Harmful Substances: Store, spill or dump substances, whether liquid or solid, which may be harmful to trees, on any part of a public tree or within the critical root zone of a public tree;
D. Construction Activities: Damage public trees through construction activities in violation of the conditions of a permit issued pursuant to this chapter. Such activities include, but are not limited to:
1. Making excavations or cuts in the soil near roots of public trees unless otherwise approved by the City Forester;
2. Damage roots of a public tree by compacting or placing fill within the critical root zone of a tree;
3. Engage in any pruning activity on public trees not in accordance with ANSI A300, including, but not limited to, topping, heading, rounding or shearing, unless otherwise approved by the City Forester. (1952 Code § 9-16-10)