The current version was released in 2013 (NQA-1-2012), however the most commonly used version is NQA-1-2008 with the NQA-1a-2009 addendum.
The current version was released in 2013 (NQA-1-2012). The most commonly used version is NQA-1-2008 with the NQA-1a-2009 addendum.