I have just been in touch with the acpo-people from new police certificate department. They told me that if you applied before they started and got your
subject access then you are good to go. I applied for mine in Jan got it early feb, sent to nvc late Feb and was accepted.They further went on to say that they have only started two months ago, therefore anything before that is good. People who have not yet applied would have to use them. Hope this helps!