Section 23.406 - Solicitation provisions and contract clauses(a) Insert the provision at 52.223-1, Biobased Product Certification, in solicitations that- (1) Require the delivery or specify the use of USDA-designated items; or(2) Include the clause at 52.223-2.(b) Insert the clause at 52.223-2, Affirmative Procurement of Biobased Products Under Service and Construction Contracts, in service or construction solicitations and contracts, unless the contract will not involve the use of USDA-designated items at http://www.biopreferred.gov or 7 CFR part 3201.(c) Except for the acquisition of commercially available off-the-shelf items, insert the provision at 52.223-4, Recovered Material Certification, in solicitations that- (1) Require the delivery or specify the use of EPA-designated items; or(2) Include the clause at 52.223-17, Affirmative Procurement of EPA-designated Items in Service and Construction Contracts.(d) Except for the acquisition of commercially available off-the-shelf items, insert the clause at 52.223-9, Estimate of Percentage of Recovered Material Content for EPA-designated Items, in solicitations and contracts exceeding $150,000 that are for, or specify the use of, EPA-designated items containing recovered materials. If technical personnel advise that estimates can be verified, use the clause with its Alternate I.(e) Insert the clause at 52.223-17, Affirmative Procurement of EPA-designated Items in Service and Construction Contracts, in service or construction solicitations and contracts unless the contract will not involve the use of EPA-designated items. 72 FR 63043 , Nov. 7, 2007, as amended at 73 FR 21790 , Apr. 22, 2008; 74 FR 2721 , Jan. 15, 2009; 75 FR 53134 , Aug. 30, 2010; 77 FR 23367 , Apr. 18, 2012