Noise Abatement Ordinance
(NAO)

¹ In the case of sta­tion­ary in­stall­a­tions that con­trib­ute sig­ni­fic­antly to the im­pact thresholds be­ing ex­ceeded, the en­force­ment au­thor­it­ies shall or­der the ne­ces­sary im­prove­ment meas­ures, after hear­ing the per­sons re­spons­ible for the in­stall­a­tions.

² The in­stall­a­tions shall be im­proved to the ex­tent that:

a.

is tech­nic­ally and op­er­a­tion­ally feas­ible and eco­nom­ic­ally ac­cept­able; and

b.

the im­pact thresholds are no longer ex­ceeded.

³ Un­less there are over­rid­ing in­terests, the en­force­ment au­thor­it­ies give pri­or­ity to meas­ures which pre­vent or re­duce noise gen­er­a­tion in pref­er­ence to those which simply pre­vent or re­duce noise propaga­tion.

⁴ Im­prove­ments need not be car­ried out if:

a.

the im­pact thresholds are ex­ceeded only in build­ing zones that have not yet been de­veloped;

b.

due to the can­ton­al build­ing and plan­ning le­gis­la­tion, plan­ning, design or struc­tur­al meas­ures taken at the site ex­posed to the noise will sat­is­fy the im­pact thresholds be­fore the time lim­it spe­cified in Art­icle 17.