The Flemish Government establishes special regulations for temporary situations of increased air pollution as a result of particular meteorological conditions.
These special regulations comprise limit values for air pollution of which their exceeding results in the initiation of a warning phase or alert phase depending on the case.
During the warning phase the relative authorities and the operators of major sources of pollution are informed of the fact that depending on the further evolution of the situation in the near future, the alert phase can be initiated.
During the alert phase the operators and authorities competent to this end implement the safety measures determined by the Flemish Government, while observing the severity of the situation with respect to these significant causes of pollution.
The Flemish Government also determines the way in which the public is informed and the measures with respect to the public that can be taken by the competent authorities.