It is hereby declared that if any provision or provisions of this Zoning Code or the application thereof to any zoning lot, building or other structure or tract of land, is declared by a court of competent jurisdiction to be invalid or ineffective in whole or in part, such decision shall be limited to the provision or provisions which are expressly stated in the decision to be invalid or ineffective or to the zoning lot, building or other structure or tract of land immediately involved in the controversy. All other provisions of this Zoning Code shall continue to be separate and fully effective, and the application of any such provision to other persons or situations shall not be affected.