My daughter will be starting junior slingshot in 2020 and have a question on helmet. She has a smaller head that she still wears a youth size helmet at almost 14 yrs old. She currently wears a bell gp2 youth helmet in quarter midgets which is sfi rated (also recognized as an approved race helmet in quarter midgets) and bell states has the same materials as an adult Snell helmet but isn't actually tested and Snell rated. I'm also looking at a zamp race helmet that is snell cmr2016 rated instead of sa2015 because apparently youth helmets don't get the sa rating tests.
So will she need a SA snell rated helmet or is one or both of these helmets mentioned above acceptable?