Should any provision of this chapter be declared by the courts
to be invalid, such decision shall not affect the validity of this
chapter as a whole or any other part thereof, unless so specified
in the judgment. If the courts declare the application of any of the
provisions of this chapter to any individual, use, property or structure
to be invalid, such judgment shall not affect the validity of said
application of any provision to any other individual, use, property
or structure, unless so specified in the judgment.