(a) No building or structure shall be erected, substantially altered, or its use changed unless permanently maintained off street parking and/or loading spaces have been provided in accordance with the provisions of this Ordinance. Any exceptions to this provision shall be granted only by the Board of Zoning Appeals.
(b) The provisions of this chapter, except where there is a change of use, shall not apply to any existing building or structure.
(c) Whenever a building or use is constructed or established or changed, in any way, or enlarged in floor area, number of employees, number of dwelling units, seating capacity, or otherwise to create a need for an increase in the number of existing parking spaces, additional parking spaces shall be provided on the basis of the enlargement or change. Whenever a building or structure existing prior to the effective date of this Ordinance is enlarged to the extent of fifty percent (50%) or more in floor area, number of employees, number of dwelling units, seating capacity, or otherwise, said building or structure shall then and thereafter comply with the full parking requirements set forth herein.