Registered legal nonconforming uses may be altered as long as the impact on neighboring properties remains the same. Any alteration of a registered legal nonconforming use which may alter the impact on neighboring properties must go through the expansion process set forth below. Impacts include, but are not limited to, noise, hours of operation, number of trips, sounds, view and any other affect or observable activity associated with the use which might be argued to negatively impact on the health, safety, welfare, and enjoyment of property of adjoining property owners.