The Citizen Submissions on Enforcement Matters is administered by the North American Commission for Environmental Cooperation (CEC), a trilateral institution established by the governments of Canada, Mexico, and the United States as part of the North American Agreement on Environmental Cooperation (NAAEC). The CEC received 55 submissions from June 1995 to May 2006, although these remain to be substantially discussed in the literature. This study fills in some of the gaps through an analysis of the submission process from an actor and results based perspective.