So, do the Special Notices people get the calendar notices?
Not ordinarily.
You can force the issue by checking the "Special" option on the #cal-notice hashtag, but that would apply to all calendar notices which is probably not a good idea.
To be more targeted you could put the #guidelines hashtag in the event name for the event used to send them, and then check the "Special" option on it. /static/help#hashtags
Myself, I would avoid sending any recurring item as a Special notice. To me, it is a little like crying wolf..