Astrodome
I said that we wouldn't have a problem in being tested by a uniformed police officer, but we would if our employer asked us to do so, simply because they have no system in place to ensure that such tests are conducted totally impartially and within the law.
Our current contract of employment dictates that we shall not drink alcohol whilst on duty , and to do so could lead to instant dismissal, there is no mention of being subject to the same procedure if we refuse to take a drug or alcohol test by our employer.
I assume that if we were to be suspected of doing either, our employer would call the police and then we would be subject to the due process of current legislation.
Personally, I would never drink prior to a duty, let alone do so whilst at work, and I would hope that if suspected of doing so, my employer would take me off operational duties immediately and I am sure that this applies to 99.9% of atcos.
Perhaps you would care to prove otherwise.