Austrias Avalanche and Torrent Control Service (‘WLV) is responsible for the creation of red and yellow hazard zones for municipalities threatened by avalanches. Municipal spatial plans limit development into risky areas according to the hazard zones plan. In the last decades the border setting value between the red and yellow zone (up to which settlement is possible in the yellow zone) was defined informally and individually by each provincial unit of the WLV at mostly 2.5 t/m of pressure caused by an avalanche. In 1994, a regulation introduced a nation-wide and stricter, more careful border setting of 1 t/m on a tentative basis. Within the provincial unit of Vorarlberg resistance arose because of the high settlement pressure. In consequence, the regulation of 1994 was withdrawn. In 1999, the disaster of Galtür with human casualties happened, causing public awareness of the necessity for risk reduction. This enabled the ministry to irrevocably re-enact the regulation of 1994. The new regulation has resulted in a spatial increase of the red zones. Normally, the WLV increases safety of these new areas by construction of avalanche barriers. After construction of barriers and following new assessment of the hazard zoning, the red zone can often be scaled down to the former level, before the new border setting value had been implemented. If no new settlements occur in endangered area, the overall safety is increased. Tyrolean spatial planning law restricts development into more risky areas, Vorarlbergs spatial planning law does allow it, given that protective measures are possible (two different paradigms of land use were deduced). Therefore, the new border setting had harsher effects on Vorarlberg as there is smaller ‘buffer area for this stricter border setting situation.