(a) An adjudicatory proceeding shall be commenced by service of a notice of hearing or order to show cause. A hearing in any matter as to which the commission is required to hold an adjudicatory hearing or otherwise determines to do so shall be held upon reasonable notice to each party, and shall be conducted at such place as the commission shall determine. Notice of such hearing, may be served on the party or provided by certified mail addressed to the party involved at the party's last known address.

1. (1) Such notice or order to show cause shall contain:

   1. (i) a statement of the time, place and nature of the hearing;
   2. (ii) a statement of the legal authority and jurisdiction under which the hearing is to be held;
   3. (iii) a reference to the particular section of the statutes and rules involved;
   4. (iv) a short and plain statement of matters asserted;
   5. (v) a statement that interpreter services shall be made available to deaf persons at no charge;
   6. (vi) information concerning circumstances under which an adjournment may be granted;
   7. (vii) the consequence of a failure to appear for a scheduled hearing or proceeding; and
   8. (viii) a statement informing the parties of the right of each party to be represented by counsel, to testify, to produce witnesses, to present documentary evidence, and to examine opposing witnesses and evidence.

2. (2) Such notice or order to show cause may be amended or superseded:

   1. (i) prior to the commencement of the hearing; or
   2. (ii) after commencement of the hearing, as authorized by the hearing officer.
3. (3) A notice of appearance by any attorney representing the party shall be filed with the counsel to the commission. A written answer to the charges, if demanded in the notice, or at the option of the party notified, shall be filed at least five days before the hearing commences.

(b)