Understanding the theoretical background is imperative for the meaningful framework of the study. Discussion of sustainability discourses in the context of ecotourism, particularly the concept, role, and evaluation strategies, were found to be important to this research. Similarly, understanding of community intervention approach pertaining to ecotourism, relevance of the linkages with common property, and co-management regime are found significant in this domain of discussion. Community intervention mechanism in general and PA-based ecotourism, in particular, were important to this study. Destination sustainability, its measurement, dimensions and destination quality, and the relationship between community intervention strategies, destination sustainability, and destination quality are discussed in the subsequent sections of this chapter.