one
RefChat Addict
Where does it say that? the only law that you quoted says "goalkeeper cannot be guilty of a handling offence incurring a direct free kick or any related sanction" Picking up a back pass is not a "handling offence incurring a direct free kick"Law 12 specifically does not allow a goal keeper to be dismissed for picking up a back pass for a DOGSO(H).
I also find that you are contradicting yourself by effectively saying the goalkeeper can not be sanctioned for an 'act' so he can't be sent off but later saying he should be cautioned (a sanction) for the same act.
EDIT: Please refer to my reasoning in the post just above yours. That part of the law was changed for a reason. To clarify this exact situation (and a couple of other similar ones).