The interpretation and application of the provisions of this Ordinance shall be held to be the minimum requirements, adopted for the promotion of the public health, safety, convenience, comfort, morals, prosperity, and general welfare. Passage of the Comprehensive Zoning Ordinance in no way legalizes any illegal use existing at the time of its adoption. When the requirements of this Ordinance conflict with the requirements of any other lawfully adopted rules, regulations, or Ordinances, the most restrictive or those imposing the higher standards shall govern.