The specific reference to the jobs changing was in going from an open-pit bulk operation to a much more technical underground operation that is in narrower working areas. You have to deal with ground stresses. You have to deal with a lot of variables that we have a lot of experience in as a company, but that our employees have no experience in. As we're moving from open pit to underground, it changes the work environment completely for these individuals, requiring a different level of training and a different level of skills.
On March 25th, 2014. See this statement in context.