Questão jurídica principal
Whether ordering a full fitness-to-drive examination was proportionate after a positive cocaine hair test with possible external contamination.
Decisão extraída
A further control examination with hair analysis was sufficient at this stage; a full fitness-to-drive examination was premature.
Fundamentação extraída
The positive cocaine finding was not beyond doubt proof of consumption because external contamination could not be excluded. Given the proportionality principle, the less intrusive hair-based abstinence control was the appropriate first step.