(a) New uses. Any commercial or industrial use established after the effective date of this code shall comply with the minimum performance standards contained in this chapter.
(b) Existing uses. Existing lawfully conforming or nonconforming commercial and industrial uses which are not in compliance with the performance standards of this code are exempt from the requirements of this chapter. However, a use that does not comply with the standards shall not be increased in the degree of noncompliance. Such uses shall be permitted to be enlarged or altered provided that the enlargement or alteration complies with these performance standards.
(c) Certification. When necessary, the Director of Community Development or his designee may require of the applicant certification by a registered professional engineer or other qualified person, at the expense of the applicant, that the performance standards for a proposed use can be met.