Apportionments may be made irrespective of whether there is on deposit at the time thereof a sufficient amount in the Urban School Construction Aid Fund to permit the payment of the apportionments. Disbursements may be made under any apportionment from any funds in the Urban School Construction Aid Fund irrespective of whether there exists at the time of the disbursement a sufficient amount in the fund to permit the payment in full of all apportionments previously made. However, no disbursements shall be made from any funds in the Urban School Construction Aid Fund required by law to be transferred to the General Fund, or from any moneys therein which the Controller deems necessary to satisfy appropriations from the fund for purposes other than apportionments.