-
freshly shaved before each ride. You wouldn't even need a TT helmet.
This is already true, bare shaved head is already up there with pointy "safety" helmets and only convincingly beaten by head fairings. This is one of the reasons why I think @xavierdisley is wrong to ban pointy hats in his rules, it gives an advantage to not wearing a helmet. However illusory the benefits of a "safety" helmet might be in a time trial, it shouldn't be that case that people are forced to choose between being "safe" and being fast. It's also a reason to ban head fairings in general.
Ears pinned back or removed completely. Retain elongated lobes for rule-flouting if you want to sneak into the road category with your TT helmet.
Nose should be bulbous/hemispherical. Alternatively remove completely (+2 airflow, -40 charisma)
Skull should be elongated from birth for that aero teardrop shape and freshly shaved before each ride. You wouldn't even need a TT helmet.