Questão jurídica principal
Whether the breath alcohol test was valid under Art. 11 SKV despite less than 20 minutes since drinking ended.
Decisão extraída
For test devices, the 20-minute waiting period cannot be replaced or shortened by a mouth rinse unless the device manufacturer provides for that scenario; here the manual expressly said a mouth rinse does not shorten the waiting time, so the test was invalid as proof of intoxication.
Fundamentação extraída
The court interpreted Art. 11 SKV in light of its wording, system, purpose, and legislative history. The manufacturer reference in lit. b only governs mouth-rinse procedures that the manufacturer itself allows; it does not allow bypassing the statutory 20-minute waiting rule in lit. a. Since the manual expressly excluded shortening by mouth rinse, the statutory requirements were not met.