How/When can I find out how many tags, if any, will be available for a left over controlled hunt draw?

Specifically, I am looking at applying for unit 31 antlerless deer as a non resident. I do not want to apply (waste $ and time) if there are no tags available. I know that the application period is Aug 5-15 and am just trying to get everything together. Thank you for your time.
Answer: 
The list of hunts available will be out (on our website and at vendors) by August 4. 
Answered on: 
Monday, July 22, 2013 - 2:45 PM MDT