"The mission of the Rocky Mountain LandUse Institute is to serve the public interest as an interdisciplinary, non-partisan forum for land use and environmental issues in the Rocky Mountain West."
One of their primary programs is the Sustainable Community Development Code and Reform Initiative, a highly innovative and comprehensive assessment of zoning code changes required to support the development of sustainable communities (Code Framework, also PDF Slide presentation, 2007).
A background paper, Sustainable Zoning: A New Imperative - The Sustainable Community Development Code, is useful.