Okay, I went down a rabbit hole on what the rulebook specifically states is being judged in each divsion. Conformation can be taken into account in A/O, pony, and junior hunter divisions but there is no note about conformation in green sections. Welfare rules also state that showing a horse with a “raw sore” is a violation that results in disqualification.
HU128 General — Hunter classes are to be judged on performance, way of moving and soundness. All horses being considered for an award must be serviceably sound.
HU132 Green Hunter — no note on judging specifications, assume this means it falls under HU128
HU136 Conformation Hunter — “All Conformation sections are to be judged 70% on performance, 30% on conformation.”
HU137 Amateur Owner Hunter — “To be judged on performance and soundness. If conformation is to be judged, it may not count more than 25%.”
HU138 Adult Amateur — “To be judged on performance and soundness, suitability to count.”
HU142 Pony Hunter and Green Pony Hunter — “Manners of the pony and suitability of the pony to the rider must be emphasized in all classes… Conformation must not exceed 25% in any class except a Model class.”
HU143 Junior Hunter 3’3” and 3’6” — “In all classes manners will be emphasized and extreme speed will be penalized… Conformation is not to exceed 25% in any class except a Model class.”
And for reference…
HU121 Soundness
All horses must be serviceably sound. All horses being considered for an award must jog for soundness. (Exception: Under Saddle classes, sections or classes with specifications that do not require horses to jog, in unrated classes). See HU118 for methods of jogging for soundness. Horses/ponies that are unsound will be ineligible for an award in that class. The judge’s decision regarding soundness is final.
HU122 Conformation
Quality, substance and soundness. Judges must penalize but not necessarily eliminate horses with structural faults, defects and blemishes (such as pin firing) in areas which might impair their activity and durability. Horses must be stripped for conformation judging in any class. (Exception: Under Saddle classes.)
HU100 Horse Welfare notes that “excessive use of the spurs or spurring resulting in broken and bleeding skin,” “showing a horse with hypersensitive, raw or bleeding sores around the cornets, pasterns, legs or body,” and “inhumane treatment of a horse in a stall, aisle, schooling area, competition ring or elsewhere on the competition grounds, by any person” are prohibited.