Unclear definition of property rights for both public and private holders has historically exacerbated problems of unplanned and unauthorised land use, including forest clearing. The recently established Rural Environmental Cadastre (CAR) system is an important step towards addressing environmental aspects of regularisation of rural holdings (Section 4). There is no federal legal requirement for strategic environmental assessment of territorial plans and other development programmes, although some states have made it mandatory and ecological-economic zoning covers more than 70% of the territory.