The department shall maintain an index by name and subject of all written final decisions, determinations and orders rendered by the department in adjudicatory proceedings. Such index and the text of any such written final decision, determination or order shall be available for public inspection and copying. Each decision, determination and order shall be indexed within 60 days after having been rendered. The department may delete from any such index, decision, determination or order any information that, if disclosed, would constitute an unwarranted invasion of personal privacy under the provisions of subdivision 2 of section 89 of the Public Officers Law and may also delete at the request of any person all references to trade secrets that, if disclosed, would cause substantial injury to the competitive position of such person. Information which would reveal confidential material protected by Federal or State statute, shall be deleted from any such index, decision, determination or order.