f a mind becomes by a certain date that is surely desirable situation which in interests both of region concerned and eventually the union as whole
If a mine becomes competitive by a certain date, that is surely a desirable situation, which is in the interests both of the region concerned and, eventually, the Union as a whole.
If a mine becomes by a certain date, that is surely desirable situation, which in interests both of region concerned and, eventually, the Union as whole.