The lawful use of parking and loading facilities existing on January 8, 2007, may be continued although such facilities may not conform to the regulations herein. Parking and loading facilities permitted before the adoption of the regulations herein shall be referred to as “permitted nonconforming uses.” No permit shall be issued for any lot, tenant, or development after the effective date of this chapter unless the same is in conformity with, the provisions of this chapter. No parking or loading facility, except where specified herein, may be substantially improved, converted, enlarged, or otherwise altered without conforming to this chapter.