Anyone stealing the data, yes. I read the article as saying that people using remobvable media for purposes consistent with their jobs will now be subject to court martial.
Example: A machine is normally connected to the network. It is moved to another location and is not connected to the network yet. Someone using a thumb drive to copy a file from a machine on the network to the unconnected machine is breaking the new directive even if the thumb drive never leaves the office or is erased immediately thereafter.
Just an opinion of a paraphrasing of a leaked memo describing a directive...