First of all, it's not regulated as far as we are aware. This is a practice we follow and have for a number of years. We do, however, know of many companies similar to us that follow the same practice. Some of our customers do regulate it.
In terms of how many times we would refuse to work at a site, I don't have an exact number. Many times we would make recommendations to the management or leadership of the delivery site indicating some opportunities for improvement. I would say, very rarely, would we actually have to refuse to make a delivery there. We will track them to make sure our recommendations are either followed through or at least that we get a reason why they may or may not be followed. It would be less than 5% of the time that we refuse to make a delivery.