Questão jurídica principal
Whether Art. 15 LSVO/ZH remained valid after the USG and LSV entered into force
Decisão extraída
Yes. The municipal rule remained applicable as an independent emission-control measure complementing federal law.
Fundamentação extraída
Federal environmental law leaves room for cantonal or communal provisions that supplement or, where permitted, tighten federal standards. Art. 15 LSVO/ZH qualifies as a permissible operating rule under Art. 12(1)(c) and (2) USG.