Part I - The Sources of Tourism Law and the Principle of Sustainable Industry: 1 An Introduction to Sustainable Tourism.- 2 National and International Law. The Importance of Cooperation.- 3 Customary Law.- 4 Private Autonomy.- 5 The Worldwide Concept of Sustainability and Tourism.- Part II - Consumer Contracts and Tourism: 6 Consumer Contracts and sustainability.- 7 Hospitality Industry and Contracts.- 8 Travel Contracts and Sustainable Mobility.- 9 Mass. Travel Contracts.- 10 Unfair Commercial Practices in Tourism Market.- Part III - Tourism Industry Business Contracts and Sustainability Policies: 11 Tourism Industry Business Contracts.- 12 Tourism Industry Contracts and Structural Formulas: Management and Ownership.- 13 Conclusion