A mate of mine is a tally clerk at the wharfs. I said you should...

A mate of mine is a tally clerk at the wharfs. I said you should buy some of these. He said that they were pushing for saliva testing because urine testing registered at least 3 days and therefore invaded your private life, that is the weekends. He was lead to believe that saliva testing could only detect the previous 12 hours. I said I would try and find out for him. Also he claims that they have a tolerance level for a lot of these drugs. If you take amphetamines on the weekend you buy cold pills and they give you an alibi if they test you. Because they are used in them. He claims it is a grey area atm.TIA.