The purpose of this Section 1.6 is to regulate and limit the development and continued existence of uses, structures, lots, signs, and site features such as parking and landscaping, that were lawfully established prior to the effective date of this Code, but that no longer conform to the requirements of this Code. All such situations are collectively referred to in this section as “nonconformities.” While nonconformities may continue, the provisions of this section are designed to curtail substantial investment in nonconformities to bring about their eventual elimination in order to preserve the integrity of this Code and the goals of the City.