Section 3642. Severability

If any clause, sentence, paragraph, or section
  of this part shall be adjudged by any court of competent jurisdiction to
  be invalid and after exhaustion of  all  further  judicial  review,  the
  judgment  shall  not affect, impair or invalidate the remainder thereof,
  but shall  be  confined  in  its  operation  to  the  clause,  sentence,
  paragraph,  or section of this part directly involved in the controversy
  in which the judgment shall have been rendered. The provisions  of  this
  section  shall  apply to all sections of this part except those sections
  which  are  expressly  subject  to  separate   severability   provisions
  contained hereinbefore in this part.