(a) In the evaluation of a bid or proposal for an agency procurement of products, the agency shall decrease the bid or proposal by five percent if the bid or proposal indicates that the products being purchased will be recycled products.
(b) A decrease made under (a) of this section is in addition to other preferences allowed for the procurement.
(c) The department shall establish the minimum percentage of recycled content that will qualify a product as a recycled product under (a) of this section.