No license shall be suspended or revoked nor a fine imposed until
after a hearing has been held before the Director upon at least seven
business days' notice to the licensee. Such notice shall be served
either personally or by certified mail, return receipt requested,
to the last known address of the licensee and shall state the date
and place of the hearing as well as enumerate the grounds constituting
the allegations against such licensee. The licensee may be represented
by counsel and may produce witnesses in his own behalf. A record of
the hearing shall be taken and preserved. For purposes of such hearing,
the Director may administer oaths, take testimony, subpoena witnesses
and compel the production of books, papers, records or other documents
deemed pertinent to the subject of the hearing.