Section 24-711. Labeling requirements

Within thirty days after a facility
  inventory form is first  required  to  be  filed  for  a  facility,  all
  hazardous  substances  present  at such facility shall be clearly marked
  with a label showing the chemical name and CAS identification number  of
  the hazardous substance. The information set forth on the label shall be
  in  accordance  with  a recognized hazardous substances labeling system,
  accepted by the commissioner. In the case of a substance protected under
  the "trade secrets"  provision  contained  in  section  24-709  of  this
  chapter,  the  label  should  bear  the  specific  code  assigned by the
  commissioner for such substance.