Noise Abatement Ordinance
(NAO)

The FOEN shall con­duct a na­tion­al sur­vey of noise pol­lu­tion. It shall pub­lish a geo-ref­er­enced present­a­tion of the noise pol­lu­tion in par­tic­u­lar for road, rail­way and air­craft noise and for noise from mil­it­ary fir­ing ranges and train­ing grounds. It shall up­dates this present­a­tion at least every five years.