°5., Policy review Annex 3 of the wTo agreement establishes a trade policy review Mechanism (TPRM whose purpose is to improve transparency, to create a greater understanding of the policies that countries are adopting, and to assess their impact. Many members also see the review as constructive feedback on their policies 1111 •5.,Policy review • Annex 3 of the WTO agreement establishes a Trade PoLicy Review Mechanism (TPRM) whose purpose is to improve transparency, to create a greater understanding of the policies that countries are adopting, and to assess their impact. Many members also see the review as constructive feedback on their policies