Whilst issues associated with drugs and alcohol on building sites have been acknowledged for some time, media reports suggesting that as many as one in five construction workers on the Gold Coast were recently found to be affected by illegal drugs highlight and underscore the extent of the problem.

In light of this, it is not surprising that testing for impairment due to alcohol or illicit substance abuse has become a significant topic of debate. Indeed, amendments made last year to the Building Code 2013 require contractors performing work on federal government projects (subject to thresholds) to have an…