Trees shall be required in the right of way fronting the lot, as required by this chapter. Existing lots that do not meet this provision at the time of its enactment must comply when a development action is proposed that is compatible with the applicability provisions or when the city issues a building permit to the owner for an exterior alteration, visible from the street, to the main building on the lot, excluding permits for windows and roof materials. Lots that meet the tree provisions, including existing grandfathered lots, must continue to meet the tree code provisions. (Ord. 2009-50, 10-6-2009)