(a) Any use established after the effective date hereof shall comply with the minimum performance standards contained in this Division.
(b) Existing uses which are not in compliance with the performance standards contained in this Division are exempt, except where a use did not comply with performance standards in effect prior to the effective date of this Ordinance.
(c) Uses which do not comply shall not be increased in scope or magnitude. Such uses shall be permitted to be enlarged or altered, provided the addition or change conforms with the applicable performance standards.