A tree plan is required in conjunction with all development permits, unless there are no private trees 12 inches or more in diameter, no City trees six inches or more in diameter, and/or no street trees three inches or more in diameter, and the site or activity is exempt from Section 11.50.050 On-Site Tree Density Standards; and Section 11.50.060 Street Tree Planting Standards. The City Administrator may reduce the tree plan requirements for development alterations that do not include changes to topography, landscaping, exterior improvements, or street improvements or add gross building area. If multiple development permits are required for a development proposal, including demolitions and subsequent construction, the same Tree Plan must be included with each permit. For tree removal when no development permit is required, following completion of the development permit, or when tree preservation does not apply per Subsection 11.50.040 A.1., see Chapter 11.40.