The standard integrates both management and performance criteria and is based on leading international sustainability and CSR standards and guidelines:
- EMAS III - The EU Eco Management and Audit Scheme
- ISO 14001 - Environmental management
- UNEP - Tour Operators’ Initiative (company and supply chain management manuals)
- GRI - Global Reporting Initiative, tour operator supplement
- GSTC - Global Sustainable Tourism Council (GSTC) Industry Criteria
- OECD - Guidelines for multinational enterprises
- ISO 26000 - Corporate Social Responsibility Guidelines and principles