If it will certify today, no reason for it not to certify later. The fact that it already has a tag should mean zilch when it recertifies. Unless you're in the boonies where getting to a person to certify in a reasonable amount of time, I wouldn't waste my money. If you went to sell and its a sticking point, then do it. Hell for all we know NHRA may change the regulation in the future anyway.
Doug