As written in the D.P.C.M. of the 12 March 2002 Title III, art 15 the rule becomes law: This decree enters into force the day of its publication in the Official journal of the Italian Republic. Concerning the time to adapt to the standards, if the machinery is for productive process it has to be adapted within 18 months from the entrance into force of this decree. Concerning the plants for civil use of thermic power equal or more than 1,5 MW installed before this rule became law, they can be adjusted according paragraph 2, within two years from the entrance in law of this decree.