That's generally done by the operators themselves to make sure they are drug-free, they have clean records, etc.
On May 13th, 2010. See this statement in context.
On May 13th, 2010. See this statement in context.
Team Leader, Conservation of Resources, National Energy Board
That's generally done by the operators themselves to make sure they are drug-free, they have clean records, etc.
See context to find out what was said next.