<P> Participatory Guarantee Systems (PGS) represent an alternative to third party certification, especially adapted to local markets and short supply chains . They can also complement third party certification with a private label that brings additional guarantees and transparency . PGS enable the direct participation of producers, consumers and other stakeholders in: </P> <Ul> <Li> the choice and definition of the standards </Li> <Li> the development and implementation of certification procedures </Li> <Li> the certification decisions </Li> </Ul> <Li> the choice and definition of the standards </Li> <Li> the development and implementation of certification procedures </Li>

Which of the following is a criterion for usda organic certification