All using departments shall submit to the purchasing officer, at such times and in such form as he shall prescribe, reports showing all supplies and equipment which are no longer used or which have become obsolete or worn out. The purchasing officer shall have authority to sell all supplies and equipment which cannot be used by any department or which have become unsuitable for city use, or to exchange the same for, or trade in the same on, new supplies and equipment. Such sales shall be made pursuant to CMC 3.16.110, 3.16.120 and 3.16.130, as applicable. (Ord. 649 § 2, 2015).