Pete,
I do not wish to engage in any disputes with you. I use single
quotation mark around the word 'restricted' and not double quotation
mark.
According to this website

http://www.grammartips.homestead.com...ationmark.html

" single quotation marks for words that are not actual quotations but
that are being set off for some other reason"

I just simply expressed my opinion that Jim's post is appropriate in
rec.aviation.student group.

Hai Longworth