Section 1172. Severability of provisions

The powers granted and the duties
  imposed by this article and the applicability thereof  to  any  persons,
  tax  districts or circumstances shall be construed to be independent and
  severable and if any one or more sections, clauses, sentences  or  parts
  of  this  article,  or  the  applicability  thereof  to any persons, tax
  districts  or  circumstances  shall  be  adjudged  unconstitutional   or
  invalid,  such  judgment  shall  not  affect,  impair  or invalidate the
  remaining provisions thereof  or  the  applicability  thereof  to  other
  persons,  tax  districts  or circumstances, but shall be confined in its
  operation to  the  specific  provisions  so  held  unconstitutional  and
  invalid  and  to  the  persons, tax districts and circumstances affected
  thereby.