"Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net wrote in message
...

It just seems like it would be tough to impossible to enforce, to me.

Nope they are not and you are right it is would be a problem. My bet
though is that a mouth swab or some other sort of test to check for
estimated time of use could be developed.

They do mouth swabs in some situations. Apparently (says an industry
source) there's some margin of error; somebody who used that day and would
have failed a UA passed the swab test. This woman worked for a company
that sold a UA test kit, a masking agent to beat that kit, and about six
months after they released thta they released an advanced UA test kit that
detected the masking agent.

Interesting racket.

-c