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The first series of publications released in the 1970's were the \"green books' as they had green covers. A second series of publications were released in the 1980's and known as the 'Red books' (red covers). The last authoritative publication was the 'Red Book Status Report on the Implementation of Conservation Reserves for Western Australia', 1993. Digital versions of the boundaries were established in 1995, until then the Proposed Conservation Reserves existed only in paper map form. System 6 areas were used as the basis for the Bushforever programme (Dept of Planning and Infrastructure), reserving areas for native vegetation preservation in the metropolitan area. Proposed Conservation Reserve or 'Red Book' areas are used within many planning process and environmental assessments. It is important to note that the 'Red Book' initiatives have been adopted and implemented with wide variation by Government agencies. 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