Service of inventory.) (a) Not less than 30 days prior to filing of the verified report required by Section 28-11, an independent representative shall mail or deliver a copy of an inventory of the estate to each interested person; provided, however, that prior to that time any interested person shall be given a copy of an inventory upon written request. An independent representative need not file the inventory with the court.
     (b) Within 90 days after issuance of letters of office to an independent administrator, said administrator shall provide to the surety on the bond, by certified mail, a copy of the inventory of the real and personal estate which has come to his knowledge. The same procedure shall apply to property coming to his knowledge after the original inventory is completed. Failure to comply with this provision may result in termination of independent administration status under the provisions of Section 28-4.