Land use planning decisions have an enormous impact on the future protection of the Green Wedges. Such decsions determine all land use and development in the Green Wedges. At one level are proposed amendments to planning schemes. These include major decisions on any proposed changes to zoning and directions for the interpretation of planning policy both by the State Government and municipal councils. At the highest level they can involve issues relating to the urban growth boundary but are more often relate to issues of potential for urbanisation to impact on the Green Wedges.