Any person who owned, possessed, kept or harbored exotic animal(s) on or before the effective date of this chapter, provided that all federal, state, and local licensing and/or approval requirements are met. Any person who falls within this subsection shall be permitted to hold, keep, harbor or maintain the number of exotic animals that person was legally permitted to hold, keep, harbor or maintain as of the date of adoption of this chapter but shall not be permitted to increase the number of exotic animals held, kept, harbored or maintained within the Township.