Noise Abatement Ordinance
(NAO)

¹ In the case of air­ports that are used by large air­craft, the plan­ning val­ues and im­pact thresholds un­der An­nex 5 num­ber 222 are com­plied with at night if:

a.

no flight op­er­a­tions are planned between 24 and 06 hours;

b.

rooms sens­it­ive to noise are pro­tec­ted against ex­ter­i­or and in­teri­or noise as a min­im­um in ac­cord­ance with the in­creased re­quire­ments for sound­proof­ing un­der SIA Stand­ard 181 of 1 June 2006²⁷ of the Swiss So­ci­ety of En­gin­eers and Ar­chi­tects; and

c.

the bed­rooms:

1.

have a win­dow that closes auto­mat­ic­ally between 22 and 24 hours and can be opened auto­mat­ic­ally at oth­er times, and

2.

are de­signed to guar­an­tee an ap­pro­pri­ate in­door cli­mate.

² When des­ig­nat­ing or de­vel­op­ing build­ing zones, the com­pet­ent au­thor­ity shall en­sure that the re­quire­ments set out in para­graph 1 let­ters b and c are made bind­ing on prop­erty own­ers.

³ The Fed­er­al Of­fice for the En­vir­on­ment may is­sue re­com­mend­a­tions on the en­force­ment of para­graph 1 let­ter c. In do­ing so, it shall take ac­count of the rel­ev­ant tech­nic­al stand­ards.