Section 20-399. Hearings on charges; decision

No license shall be suspended
  or revoked nor fine imposed until after a hearing had before an  officer
  or  employee  of  the  department  designated  for  such  purpose by the
  commissioner upon notice to the licensee  of  at  least  ten  days.  The
  notice  shall  be served either personally or by first-class mail to the
  licensee at his or her last known address and shall state the  date  and
  place  of  the  hearing and set forth the ground or grounds constituting
  the charges against the licensee. The licensee shall be heard in his  or
  her defense either in person or by counsel and may produce witnesses and
  testify in his or her behalf. A stenographic or electronic record of the
  hearing  shall  be made and preserved. The hearing may be adjourned from
  time to time. The person conducting the hearing  shall  make  a  written
  report  of  his or her findings and a recommendation to the commissioner
  for a decision. The commissioner shall  review  such  findings  and  the
  recommendation  and,  after  due  deliberation,  shall  issue  an  order
  accepting, modifying or rejecting such recommendation and dismissing the
  charges or suspending or revoking the license. For the purpose  of  this
  subchapter,   the  commissioner  or  any  officer  or  employee  of  the
  department  designated  by  him  or  her  may  administer  oaths,   take
  testimony,  subpoena  witnesses  and  compel  the  production  of books,
  papers, records  and  documents  deemed  pertinent  to  the  subject  of
  investigation.