No structure or land shall hereafter be used or occupied, and no structure or part thereof shall hereafter be erected, constructed, reconstructed, moved or structurally altered unless it is in conformity with all of the regulations for the district in which it is located.

No part of a yard, other open space or off-street parking or loading space required about or in connection with any structure for the purpose of complying with this chapter shall be included as part of a yard, open space or off-street parking or loading space similarly required for another structure.

No yard, lot or off-street parking space existing at the time of enactment of this chapter shall be reduced in size or area below the minimum requirements set forth herein. Yards or lots created after the effective date of this chapter shall meet the minimum requirements established by this chapter.

If the preliminary plan of a residential subdivision containing one or more new streets has been duly approved by the Planning Board of the Town of Lysander within six years prior to the adoption of this chapter, the lots of the subdivision may be developed with the lots and yards delineated on the plot or, if not so delineated, within the minimum yard requirements for the district in which the property was situated under the zoning ordinance in effect at the time of such approval, and any subsequent provision of this chapter requiring larger lots or yards shall not apply to the subdivision for a period of six years from the date of such approval; provided, however, that the final plan of such subdivision is duly filed in the Onondaga County Clerk's office not more than three years after such approval.

The provisions of Subsection A shall also apply relative to any amendment of this chapter.