As used in this part:

  (a) “Accessible and available market” means that opportunities exist to sell wastepaper products that are collected pursuant to this part at rates and at locations that make it fiscally reasonable to collect that paper.

  (b) “Recycled paper” means a paper product that contains not less than 50% wastepaper.

  (c) “Wastepaper” means any discarded paper or corrugated paper board that is generated after the completion of the paper manufacturing process, and includes, but is not limited to, trimmings, printed paper, cutting and converting paper, newsprint, telephone books, catalogs, or other mixed postconsumer paper. Wastepaper does not include mill broke or other in-plant residual wastes.