created to reach consensus on relevant issues related to national organic agriculture in order to write an organic agriculture law. Process To overcome the status quo created by the lack of agreement on the regulation of the certification systems, the State delegates to the GAO to find the necessary global consensus in the organic sector that will define the law of Organic Agriculture of Brazil. After intense discussions and more than a year of work, that consensus is reached and the Law is published. For the drafting of the law, the State (MAPA) invited the GAO to organize in a jointly manner several working groups on specific topics. Participatory certification was one such a group. The objective of these groups was to define the content of a decree and the regulatory instructions that will put in practice the content of the Law. The MAPA assumed the responsibility of consolidating the outcomes of the different working groups according to the legal framework. During the process, three main arguments were used to support the inclusion of the PGS in the Organic Agriculture Legal Framework: i) the need to have a guarantee system that is adequate to the social, cultural and economic reality of local peasant agriculture and family farming; ii) avoid making certification a barrier to local market development; iii) no objection on the inclusion of PGS in the national legislation. Outcome The law was passed in December 2003 (Law 10,831 of December 23, 2003.) and four years later, the decree that will regulate the Law which included the PGS was approved (Decree 6323, December 27, 2007). The implementation of PGS was recognized through the Normative Instruction no19 on the 28th of May 2009. Under this regulatory framework, the Brazilian System for Evaluating the Organic Conformity (SisOrg), which has its own organic production identification seal, was created. It validates[2] the following certification systems: o Third-party certification o Participatory Guarantee Systems At the same time, the legislation recognized two PGS systems in Brazil: v Formal systems: Participatory Bodies for Conformity Evaluation (OPAC by its acronym in Portuguese), which are recognized by SisOrg. v Informal systems: Organizations for Social control[3][4](OCS), not part of the SisOrg. The Law entered into force on the date of its publication and the deadline for everyone to comply with it is December 2010. In Brazil, PGS-certified producers by the OPACs obtain the same seal as the ones certified by third-party certification bodies. Methodology The GAO, assumed the responsibility of elaborating a legislative proposal to address the different interests/perspectives of the organic sector. The work carried out by GAO provided specific features to the Brazilian organic agriculture legislation. The organic sector interested in promoting the PGS, was supported by the people involved in the process and were offered some financial support from the State to cover part of the following incurred costs: u technical and academic assessment during the PGS systematization u part of the professional advisory on legislation and certification of industrial processes GAO s requests and proposals on PGS were based on the findings of three-systematized PGS experiences, which served