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The paper analyzes the main regulatory experiments for Privately Owned Public Spaces (POPS) in North America and Asia, comparing requirements for implementation and outcomes. It also underlines the need to make these spaces representative of the social and environmental complexity of a public place, presenting the original proposal to include in the exchange conditions regulations that guarantee ecosystem services equivalent to the loss for the community due to the bonus granted. The reflection leads to three main aspects for the edition of updated regulations: the construction of integrated networks of spaces, the consideration of the urban ecosystem and the meta-design of thematic cultural guidelines [ABSTRACT FROM AUTHOR]

The paper presents the U.S. Sustainable Sites Initiative, by illustrating and commenting the recent updates of the rating criteria in addition to a number of certified projects, including some sites visited by the author in California. The system is compared with existing tools, as LEED 2009 for Neighborhood Development Rating System, albeit some differences also in scale of interventions. In the work, scientific literature and personal considerations are given about those aspects still not evaluated by the system and its potential wider applicability with regard to directions of research on the topic. The theme fits well in the mainstream of studies dedicated to the design of resilient open spaces, contributing to adaptation and mitigation of climate change. [ABSTRACT FROM AUTHOR]