Need help, but it's no biggie. How should one address a former Office holder?

[MADem]

16. I'm not arguing with the guidance in the book, but I can tell you that

close to many thrones, it is not implemented in social circumstances, and hasn't been for many decades, either.

This isn't new as well--I've seen it with my own two eyes.

Here--you can, too.

A few media examples:

http://www.wired.com/business/2013/11/bill-gates-and-president-bill-clinton-on-american-exceptionalism/

http://mlb.mlb.com/news/article/mlb/national-college-baseball-hall-of-fame-to-honor-president-george-hw-bush?ymd=20131114&content_id=63927500&vkey=news_mlb

http://www.usatoday.com/story/theoval/2013/11/12/obama-bush-carter-clinton-ken-burns-gettysburg-address-film/3504735/

So, you see, one can talk 'protocol,' and one can see that common usage trumps it as often as not.