Except as may otherwise be determined by the Committee in the case of routine inquiries that require a response before the Committee can act, no decision or advisory opinion shall be given or made by the Committee unless concurred in by a majority thereof. The Committee shall render its decision or advisory opinion within 30 days of its receipt of the written inquiry. In every matter the secretary shall convey the Committee's response in writing to the person making the inquiry. When the Committee determines, in its discretion, that a determination is of statewide importance, it may in addition file a formal opinion and make suitable arrangements for its publication. Formal opinions shall not, insofar as practicable, identify the employee making the inquiry.