Accessory off-street parking facilities, including access driveways, shall be provided prior to the occupancy of a building or use. Facilities shall be provided for the entire building or use in accordance with the regulations contained in this Chapter whenever:
(a) A building is constructed or a new use is established;
(b) An existing building is altered and/or there is an increase in the number of dwelling units, seating capacity, the floor area of a building, or employees; or,
(c) Whenever the use of an existing building is changed to a use that requires more off-street parking facilities.