Funds generated from the property tax levy shall only be used for purposes approved by representatives of two-thirds of the member school districts in an educational service unit, representing a majority of the students in the member school districts. The valuation of individual school districts shall not be the only consideration in determining the utilization of such funds received after July 1, 2010. Each educational service unit shall prepare and transmit a written proposal of core services offerings and use of the property tax levy to all member school districts. The member school districts through their designated representatives shall indicate their approval or disapproval of the proposal within thirty calendar days after receipt of the proposal, and failure to so indicate within such time period shall be deemed approval of the proposal.