My car club news letter says the change is September 1, 2011. I have been trying to find something official on the internet with no luck.
Some seem to think this only applies to 'Classic' registration and not 'Antique' registration. I found
this at
http://www.texasyom.com/. However on their main page they say they are closing the site AUG. 20, 2011. Seems strange they would shut down if they could still sell for 'Antique' registration.
I'm still digging for more info.