Federal Act
on Spatial Planning
(Spatial Planning Act, SPA)¹

¹ Build­ings and in­stall­a­tions shall con­form to zone re­quire­ments if they are re­quired for ag­ri­cul­tur­al or hor­ti­cul­tur­al use. This is without pre­ju­dice to the nar­row­er defin­i­tion of zone con­form­ity in the con­text of Art­icle 16 para­graph 3.

^1bis A per­mit may be gran­ted for build­ings and in­stall­a­tions at an ag­ri­cul­tur­al con­cern that are re­quired for the pro­duc­tion of en­ergy from bio­mass or for con­nec­ted com­post­ing fa­cil­it­ies on the basis that they con­form to zone re­quire­ments if the pro­cessed bio­mass is closely linked to the ag­ri­cul­tur­al op­er­a­tions and to the op­er­a­tions at the loc­a­tion. Per­mits must be made con­di­tion­al on the build­ings or in­stall­a­tions be­ing used only for the per­mit­ted pur­pose. The Fed­er­al Coun­cil shall reg­u­late the de­tails.³⁸

² Build­ings and in­stall­a­tions that serve the in­tern­al ex­pan­sion of an ag­ri­cul­tur­al or hor­ti­cul­tur­al con­cern are in con­form­ity with zone re­quire­ments. The Fed­er­al Coun­cil shall reg­u­late the de­tails.³⁹

³ Build­ings and in­stall­a­tions that serve a pur­pose bey­ond the in­tern­al ex­pan­sion of an ag­ri­cul­tur­al or hor­ti­cul­tur­al con­cern may be deemed to con­form to zone re­quire­ments if they are to be con­struc­ted in an ex­emp­ted area with­in the ag­ri­cul­tur­al zone, as de­term­ined by the can­ton in a plan­ning pro­ced­ure.