Off-street parking, unloading and service requirements of this article shall apply and govern in all present and future zoning districts within the Borough of Pine Beach. No land shall be used or occupied, no structure shall be designed, created, altered, used or occupied and no use shall be operated or maintained unless off-street parking and loading facilities are provided in at least the amount required by this article; provided, however, that any use in operation on the effective date of this chapter is not affected by the provisions of this article until such time as the existing gross floor area is increased.