ยง  31. Secured creditor's claim to disclose security. In a liquidation
  proceeding every secured creditor's claim  against  the  general  assets
  shall   disclose   the  nature  of  the  security.  When  in  an  equity
  receivership it is determined that the  subject  under  receivership  is
  insolvent,  secured  creditors having claims on file which do not comply
  with this section shall make disclosure within a time to be fixed by the
  court.