Commentaries: Art. 20

Any person who carries out events involving electroacoustically amplified sound must:
1. in the case of an average sound level greater than 93 dB(A), notify this in writing to the cantonal enforcement authority at least 14 days beforehand with the information specified in Annex 4 Number 1;
2. in the case of an average sound level greater than 93 dB(A) and less than or equal to 96 dB(A), comply with the requirements specified in Annex 4 Number 2;
3. in the case of an average sound level greater than 96 dB(A) and less than or equal to 100 dB(A):
1. with a sound exposure time for no longer than three hours, comply with the requirements specified in Annex 4 Number 3.1, 2. with a sound exposure time for more than three hours, comply with the requirements specified in Annex 4 Number 3.2.
At an event involving electroacoustically amplified sound whose average sound level overall is greater than 93 dB(A), and which comprises a number of component events at the same location, the component event with the highest average sound level determines whether the obligations specified in paragraph 1 letter b must be met for the whole period of the event or whether these obligations are governed by paragraph 1 letter c.
Any person who carries out events involving sound that is not electroacoustically amplified with an average sound level greater than 93 dB(A) must, both in buildings and at fixed outdoor locations, comply with the requirements specified in Annex 4 Number 4.