After May 2017, rural properties not included in the CAR will not have access to agricultural credit. However, farmers may commit to complying with environmental requirements according to the relative Environmental Compliance Plan (PRA), including forest restoration, soil conservation and the above-mentioned maintenance of a share of the property under natural cover. In addition to having 20 years to comply with the PRA, they will receive financial support (particularly small farmers) to assist rehabilitation. Implementing this Plan, which aims to better regulate land use, preserving river bank areas, reducing deforestation in the Amazon and strengthening reforestation efforts, is a major challenge for the government and the sector. The Brazilian government has provided strong support for biofuel via measures, which include: lending to construct ethanol plants and storages, tax incentives on flex-fuel cars which can run on any combination of ethanol and gasoline, and mandatory blending ratios for both gasoline and diesel. The mandatory blending of ethanol with gasoline in fuel mixtures continues to take place, as well as the mandatory blending of biodiesel with fossil diesel.