In every case where any law to be administered by the commission created by this chapter provides that a party to a proceeding before the commission shall have a time in which to file written exceptions to a suggested order before the same may become the final order of the commission, it shall be the duty of the commission to promptly mail to each party having such right a copy of such suggested order, and the time for filing such exceptions as provided by law shall in each case commence to run on the day of mailing of such copy of such suggested order.
IC 8-1-1-9