40 CFR 247.4 - Contracting officer requirements.
Within one year after the effective date of each item designation, contracting officers shall require that vendors:
(a) Certify that the percentage of recovered materials to be used in the performance of the contract will be at least the amount required by applicable specifications or other contractual requirements, and
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.