However, the relevance of that Q&A is questionable as it is simply contained in a letter & never published as official Q&A ruling in an Annual or Journal though sufficient time has passed to incorporate it to an official response. In my estimation would be the same weight as if I were to ask a question face to face with Perry at some gathering and then publish the response as an official Q&A although never be backed up by an official response. As always, such rulings can be taken with a degree of skepticism, accepted or ignored. As per the rules as written, I stand by my response.