DrD - how can you tell it is SA95 without seeing the sticker?
There should be a sticker on the inside near or slightly under the padding that will have Snell, blah blah blah SA and then either 2000 or 1995. On my SA 2000 it is almost like a hologram that covers the whole sticker.
This is the ONLY way you can prove to a tech inspector that the helmet is SA95 or 2000.
However, after doing a 10 second yahoo search (shame Danio, shame! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'> ) I think that you better check with the sanctioning body to see if they will accept
M rated helmets. Sorry man...
http://www.kbchelmet.com/tk7s.html