Except for the incidental expense fund provided for in this act, funds of the district shall be disbursed only upon order of or voucher approved by the port commission. Such approval may be by approval of a settlement sheet, listing any number of such vouchers and showing the date thereof, the person making claim for disbursement, the purpose of the disbursement in general terms and the amount of the disbursement. Such disbursement shall be by check or draft signed by any two (2) of the following named entities, to-wit: the port district manager or any duly elected, qualified and acting member of the port commission. The signature of one (1) of the port commissioners signing any such check or draft may be by facsimile.