Controlling when, how often and what type of fertilizer may be used by professionals is one thing but; controlling this for homeowners who do their own lawn work is too intrusive. We are not all rich enough to have all this work done by professionals.
A complete ban on applying fertilizer for four months is excessive when products exist that can safely be used anytime. I suggest that you focus on what can be done with what products rather than what cannot be done.
Trees and plants already on public property should be allowed to remain so long as they are properly cared for.