Do you know what the independent verifier is?
It is a legal entity governed by private law responsible for monitoring the quality and goals of concessions and public-private partnerships. Possibly, the experience with such independent verifier has inspired the verifier regulation of packaging reverse logistics systems.
Check out here the article written by Fabricio Soler, partner at Felsberg Advogados, and by Talden Farias, lawyer at Farias E Moreira Advogados Associados, for ConJur, available in Portuguese.