(a) Any time during a fiscal year that any principal feels that the recommendations of the revenue estimating conference are no longer valid, then that principal, with appropriate notice, may convene a revenue estimating conference. The principal requesting the additional conference shall be the chairperson for that conference.
(b) If at any time during a fiscal year any participant feels that the recommendations of the revenue estimating conference are no longer valid with respect to their revenue sources then that participant has a duty to and shall notify each of the principals.