1 The cantons shall work with the communes to take the measures that are required in order that building zones are used for their assigned purpose, in particular measures required under land law such as land reorganisation projects (Art. 20).
2 Where it is in the public interest to do so, cantonal law shall provide that the competent authority set a deadline for the development of a parcel of land and can order specific measures if the deadline expires without development taking place.
35 Inserted by No I of the FA of 15 June 2012, in force since 1 May 2014 (AS 2014 899; BBl 2010 1049).