What are the regulations regarding how long a driver is to be notified of a drug test? In Portland OR, the driver is given no notice at all. Sometimes a feeder manager is waiting for the driver at the guard shack as they walk in. I was informed that 5 out of 13 feeder drivers in Payette ID were given 12 hours notice of a test and told to drive to a testing lab on 6/12/06 instead of testing on property. Why the double standard?