Yes, actually. There was a review that was conducted to assess the use of ion scanners and their reliability. As part of the review the validity of the tool was confirmed and we identified areas that required enhancements. There was a bulletin that was issued in October of 2017. As you know, the ion scanner is only one piece of information. It's to actually be able to detect trace amounts of drugs. Even if you test positive on the ion scanner then there has to be another assessment.
On March 1st, 2018. See this statement in context.