No person shall interfere, or cause any person to interfere with, the director or persons acting under his or her authority while engaged in planting, mulching, pruning, spraying, treating, trimming or removing any parkway tree, shrub or plant or in the removal of any stone, cement or other substance or plant material from or adjacent to the trunk of any parkway tree.
(Ord. 556 § 2 (part), 2000).