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The prevailing regulatory framework for light pollution control is based onestablishing conditions on individual light sources or single installations(regarding features like ULOR, spectrum, illuminance levels, glare, ...), inthe hope that an ensemble of individually correct lighting installations willbe effective to somehow solve this problem. This "local sources" approach isindeed necessary, and shall no doubt be enforced; however, it seems to beclearly insufficient for curbing the actual process of degradation of thenight, and for effectively attaining the necessary remediation goals. In thispaper we describe a complementary (not substitutive) 'red-lines' strategy thatshould in our opinion be adopted as early as possible in the policies for lightpollution control. This top-down approach seeks to set definite limits on theallowable degradation of the night, providing the methodological tools requiredfor making science-informed public policy decisions and for managing thetransition processes. Light pollution abatement should routinely be included asan integral part of any territorial management plan. A practical applicationcase-study is described to illustrate these concepts.

Keeping light pollution at bay: a red-lines, target values, top-down approach