Bronx
No, I'm not misunderstanding, I'm simply saying "what has alcohol in urine got to do with anything"?
Alcohol in urine does not indicate any wrong doing.
Its equivalent to making wearing anything red a criminal offence.
What legal purpose is served? What crime is committed, other than failing to empty one's bladder (apart from taking the pee)?
There is added significance in this (as already noted) in the mention of "drugs" - these are completely undefined and could allow all kinds of intepretation.
When any law is made, it is important to first ask:
What is the purpose?
Let me ask you a question: "if breathe and blood tests are negative, do you think a positive urine test should lead to prosecution, loss of license, livelihood and prison"?