SAT Subject Test as standby?

<p>So I wanted to register for the SAT Subject for the June test, but all of the test centers around me are full now.
(There're ones that are like 3-5 hours away)</p>

<p>So, I want to take a test in standby in June.</p>

<p>On the website, it tells to "Fill out the registration form completely"
Where can I find this registration form?
Also, it says to have a "sealed envelope" and bring it to the supervisor of my test center?
Is this "envelope" like what I need to prepare prior to testing?</p>

<p>Also, what are the chances of me getting in as a standby?</p>

<p>Thanks. :)</p>

<p>I think you should go to one of the local testing centers and inform them that you want to do standby testing. They should have the envelopes and registration forms. At least, that’s how I did it when I took the SAT on standby.</p>