The regulation calls out 19 vehicle functions which must have physical controls inside the vehicle, with additional requirements about size and usability of the buttons.

Those functions include:

Turn signals
Hazard lights
Horn
PRND gear shifter
Driver assist function, if present
Windshield wipers
Windshield defroster
Power windows
Emergency call system
Power off switch for EVs
  • bountygiver [any]@lemmy.ml
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    10 days ago

    And I am providing a reasoning why they choose those but not AC.

    Because it is not essential to driving, it could be seen as an overregulation to require that