For assignment to private rehabilitation, environmental damage caused by mining activities at the end of the first areas to be delivered back to the state. (The duration of bonds not to exceed 30 years).
For a private rehabilitation, environmental damage resulting from mining activities at the end of the operation before it is delivered to the back area of the State (the duration of the bonds cannot exceed 30 years).
For the private sector to revitalize environmental damage caused by mining activities at the end of the first night will be delivered to the state (the duration of bonds does not exceed 30 years).