@Highflyer1 I think from reading the USEF rules, and US Equestrian publications there are almost no unapproved helmets for USEF. They merely have to be ASTM / SEI tested. I think they can be as old as you like, or in any condition you care, and be legal. The Nov 7, 2022 US Equestrian publication on Equestrian Helmet Fitting & Safety has nice tables comparing the rules for USEF, FEI, British Dressage, British Riding Club, and Pony Club. Outside of USEF, other organization have age rules summarized in the tables.
The genesis of the question came from discussions, which I’m sure many others have had, after the VT test results were published. People would say, I am getting a new helmet, and I was considering model xyz, but I see its ranking in the VT study and it’s no good. Now, I don’t know whether I should get it. So, the essence is the VT study produced a rank-ordering of quality of helmets, yet all are “approved”. So, the layperson perception is some are good and others are not, or are “less good”.
This prompted the questions: it’s mandatory to have an approved and tested helmet, but it’s never checked at a competition. It’s counter argued, people can tell it’s legit just looking at it from a distance on a riders head cause it looks like a Charles Owen, or whatever. So, there’s no need to check for conformance since we don’t care how old it is anyway, and there would never be a counterfeit helmet made in China.
Liability questions then came up as it was pointed out that the USEF just says it must be any ASTM / SEI tested helmet. Yet, the public and popular perception is that not all of those are equally good, based on the VT tests. So, it was observed that the sanctioning body ignores those VT technical results and says they are just more information. That caused confusion. Are the results not valid? USEF feels as long as they meet ASTM/SEI test, regardless of age, they equally good. But, the public perception based on VT ranking is they are not equally good.
Some lawyer may eventually argue that USEF said the helmet the injured rider wore was ok (in spite of the disclaimer in the USEF rules saying no helmet can always protect you). Yet the VT study said it was poorly ranked, and USEF decided not to have a more constraining rule requirement to reflect that, as other bodies have had more constraining requirements, such as age of certification.
There will no doubt be more technical testing and analysis aimed at improving safety for riders and our horses. This will inevitably cause more discussion about how that knowledge should be incorporated into rules, norms, and conventions. More knowledge will lead to better outcomes.
Anyway, have a great and safe ride everyone!