The City Manager shall be the purchasing agent of the City. All purchases or supplies for the City shall be made by him and he shall approve all vouchers for the payment of same. Said purchasing agent shall also conduct all sales of personal property which the City Commission may authorize to be sold as having become unnecessary or unfit for the City's use.
All purchases and sales shall conform to such regulations as the City Commission may from time to time prescribe. Where purchases or sales are made on joint account of separate departments the purchasing agent shall apportion the charge or credit to each department. He shall see to the delivery of supplies to each department and take and retain the receipt of each department therefor.