Can somone explain this new NHRA rule?

[82 GT]

Our local racetrack has posted this new NHRA rule regarding helmets. I'm not sure what this means or if I need to get a new helmet or not.
Could someone shed some light on this for me?
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Beginning Jan. 1, 2006, where a Snell-rated helmet is required in NHRA competition, the Snell 90-tagged helmets will no longer be allowed. NHRA is making this announcement more than five months prior to the expiration tom allow the racing community the chance to update their safety equipment.

For the 2006 NHRA Rulebook, in the General Regulations under Helmet and Goggles, the section will list expiration dates for all Snell- and SFI-tagged helmets in an effort to notify the racing community of these expiration dates.

At the end of the year, Snell plans to release the 2005 tag for inclusion on helmets constructed after that point.