Current grading rule: abs(time) < {0.6, 2.0, 3.5, 6.0} / (1.5 - #RANK * 0.25) * 0.024ms (thus ±19.2ms for #RANK 3 and ±14.4ms for #RANK 2)

This rule is too unusual to adapt #EXRANK or related commands. Maybe we should rethink about it.