WCAG 2.0 and JAWS

I'm not sure how to ask this, but does JAWS have a limit for meeting the
criteria for WCAG 2.0? In other words, does JAWS 12.0 meet the criteria?
11.0? 10.0? So forth? How far back do we not have to worry about the
criteria and assume the user has an "at least" version xx.0? Same question
for internet browser? IE9, IE8, IE7.?

 

Sincerely,
Ryan Jean
IT & Social Media Specialist
The Disability Network
Flint, MI