The criteria for the Clef Verte / Green Key label are established at international level by the Foundation for Environmental Education and reviewed every 4 years to take account of technological progress and environmental issues. Each country uses the international criteria to develop its own criteria, which may not be less demanding than the international standards. Each country may, on the contrary, strengthen certain criteria and must systematically obtain approval for any changes from the Green Key label's International Management.
The Green Key criteria are regularly re-evaluated to ensure that they remain ahead of their time and meet the new environmental requirements of the Fondation pour l'Education à l'Environnement (FEE) internationally and Teragir in France.
The Clef Verte label is a guarantee of seriousness. It certifies that the environmental approach of the tourist accommodation or restaurant meets over a hundred criteria in all areas of sustainable tourism management. These criteria enable establishments to reduce their environmental impact and make a commitment to achieving the UN's Sustainable Development Goals.`
Sources : "Les criteres du label Clef Verte - La Clef Verte"