Your link won't scroll on a mobile device. Have to read it later when back home.<quoted text>
I believe that they would withstand a Constitutional challenge, and be upheld.
Read pages 10 through 15.
Still it is illogical that voluntarily getting a type of drivers license means it is ok for the government to require drug tests at anytime witout cause yet voluntarily sucking on the public teet is no reason to be required to be drug tested.