Should any section or provision of these requirements contained herein or as amended, or the application thereof to any person or circumstance hereinafter, be declared by a court of competent jurisdiction to be invalid, such decision shall not affect the validity of these regulations as a whole or any part thereof, other than the part so declared to be invalid. The Planning Board hereby declares that it would have enacted these regulations or the remainder thereof, and the Town Board declares that it would have approved the same, even if the invalidity of such section or provisions or its application had been apparent.