For every building hereafter erected, altered, extended or changed in use, there shall be provided off-street parking spaces at least as set forth below as a condition precedent to occupancy of all buildings or land. Off-street parking, loading and stacking facilities conforming to the requirements of this article shall be provided as follows:
A. New or moved buildings and uses. Parking, loading and stacking facilities, as required, shall be provided for all buildings and uses constructed, established or moved to new sites.
B. Increase in intensity of use. An increase in the intensity of use of a building or premises shall mean the addition of dwelling units, gross floor area, seating capacity or any other unit of measurement used as a basis for determining required parking, loading and stacking facilities. Additional parking, loading and stacking facilities, as required, shall be provided for any such increases in an existing use.
C. Change in use. When the use of any building or premises is changed to a different use, parking, loading and stacking facilities, as required, shall be provided for the different use.
D. Nonconformity parking, loading and stacking facilities. A building, use or occupancy lawfully existing at the time this article or any amendment thereto becomes effective, but which does not conform to the off-street parking, loading and stacking requirements, may be occupied or continued without such facilities being provided. Any such spaces that may be provided thereafter shall comply with the requirements of this article. If an existing building, use or occupancy is altered so that there is an increase in the number of dwelling units, seating capacity, employees or floor area, or if the use is changed to one requiring more off-street parking, loading and stacking spaces, the number of such spaces shall be provided at least equal to the number required for the increased area of the building or use in accordance with all provisions of this article.
E. Existing facilities. Off-street parking, loading and stacking facilities in existence on the effective date of this article shall not be reduced below, or if already less than, shall not be further reduced below the requirements for an equivalent new building or use. In no case shall it be necessary to continue parking, loading and stacking facilities in excess of those required by this article for equivalent new buildings or uses.