It shall be the duty of the Purchasing Agent to require all automotive equipment at the time of purchase and at all other times to have painted or imprinted thereon the City ownership markings required by this article, and all lettering shall be painted or imprinted in such colors and form as may be prescribed by the Purchasing Agent. At the close of each fiscal year the Purchasing Agent shall report to the Council the detail of automotive equipment in each department not conforming to the provisions of this article.