Section 19-507.3. Reporting requirements

a. An owner shall maintain on file
  with the commission a current telephone number serviced by an  answering
  machine or recording device, a pager number, telephone answering service
  number or other information by which telephone contact with the owner or
  a designated representative may reasonably be expected to be made at all
  times.  An  owner  or  designated  representative  must  respond  to any
  telephone or pager contact from the commission within forty-eight hours.