A unit: shall draft specifications to encourage maximum practicable competition without modifying the requirements of the State; and may not draft specifications to favor a single prospective bidder or offeror. A unit shall require a prospective bidder or offeror of supplies or construction to state in the bid or offer: whether the procurement will or may include recycled materials; and the types, amounts, and application of recycled materials that the bidder or offeror intends to include in the procurement.