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Interpretation of helmet requirements


Model: Carrera S, Year:2009, Mileage:24,000, Type of use:Street use only
I'm planning to buy a helmet for use in a few Zone 8 DE events. I left racing in the nineties, so of course my helmet from that period is expired now and useful only as a decoration if I find something that needs a large globular appendage for esthetic reasons.The helmet requirement in Zone 8 is almost certainly a quote from the PCA recommendations, so I would like to confirm my interpretation before buying a new helmet:"All car occupants must wear a Snell approved helmet, which has the current available Snell rating or the one previous Snell rating. Expiring helmets shall be acceptable until June 30 of the year after the new standard. If it is a Snell M rated helmet and the occupant is required to wear a driving suit, then the occupant must also wear a nomex balaclava (headsock)."I have a balaclava from my days in Formula Ford and Nomex does not expire to the best of my knowledge. In any case, using a stock C2S for DE days does not require Nomex apparel, so my first interpretation to confirm is that a helmet rated Snell M is acceptable for this activity.(This matters to me only because I would prefer the increased range of visibility that many M helmets provide since they are designed for use in street traffic conditions as well as on tracks).Second, this sentence is not clear: "Expiring helmets shall be acceptable until June 30 of the year after the new standard."Snell publishes a release schedule for each generation of their standard. The schedules for the 2010 standards, one for SA/K and another for M, specify a date when compliance labels will be available for the new standard. That is effectively the earliest date at which a helmet may be sold as certified to comply with Snell 2010. The schedules also specify a date when production must cease for helmets certified to Snell 2005. That date is March 31, 2012 for either standard.I have been unable to guess which date is to be used when determining the date of "expiration" of a helmet, though the last date of production seems the more plausible. Further adding to my confusion is the preceding statement that a helmet comforming to "the current available Snell rating or the one previous Snell rating" may be used.This seems to imply that a helmet produced to Snell 2005 requirements in February 2012 may be used until the last date for use of helmets produced to the 2010 standard. That date will be roughly March 31 of 2017, well in the future as I write this. At my age, barring amazing medical advances, I am unlikely to be on race tracks by that date. In other words, it appears that I may buy a helmet that is either Snell SA/K or M certified, and that I may buy one certified to the 2005 standards expecting to use it in PCA events for several years.Can you impose on one of the rules authors to confirm my interpretations?

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