In international agreements the results of work of the ISO international standards are published as voluntary. The ISO grouped around 100 national standards bodies representing about 95% of world industrial output. Definitely in his first session in 1993, the Technical Committee on Environmental Management (ISO/TC207) occupied six subcommittees to be responsible to establish and develop schemes in areas of environmental management systems, environmental auditing and environmental labeling. The schemes presented so far., Including regulations guides ranging from environmental management principles (ISO 14000), environmental management systems (ISO 14001), a guide to environmental auditing (ISO 14010) management systems for environmental auditing ( ISO 14011) to the guide to environmental auditing – qualification criteria for environmental auditors (ISO 14012). Indeed, it is said, there are many questions that revolve around the certification and registration of environmental management systems would have to be answered such as: "You can have a de facto mandate? Could the cost be prohibitive? Could be a proliferation of different systems of registration? Could certain national standards harmonized? Could they eventually become trade barriers?. What are the implications these have on industry standards? In this regard it can point out that the implications of the ISO 14000 standards have on the industry is not to create barriers of exclusion, but to provide security and recognition for the best performance of the industry. The system that is or appears to be exclusionary in spirit, could cause negative relations toward standards organizations, opting out of participation. Importantly, we are told that the basic proposals of a free trade agreement such as NAFTA, are opening the market to create greater efficiency in production and equitable distribution of economic opportunities and benefits.