As sure as I am to say that unless there's a 'valid until' date on the form this can't be the case, there has to be some sort of transitional period. Otherwise you could download the form on 31st August and by the time you've filled it in the following day it would be invalid.
No point in worrying about anything tonight, I'll give you a definitive answer in the morning after I've checked.
Lol its not rocket science!! its the 3rd of October !!...the new form is dated September 2013 why let Moy/Ross use an old form??