I.-The provisions of this section apply to the actions mentioned in 2° of Article L. 1333-1 and to the decisions mentioned in Article L. 1333-3 to prevent or reduce a risk related to situations of long-term exposure to ionising radiation.
II – A situation of lasting exposure to ionising radiation is understood to mean :
1° A situation resulting from a radiological emergency that has caused lasting pollution of the environment or property by radioactive substances;
2° Any situation involving pollution by radioactive substances other than that mentioned in 1°.