They must not be activated at a force of less than Dop = 1.2⋅D* (when fitted at the control device) or at a force of less than Pop = 1.2⋅P* or at a pressure of less than pop = 1.2⋅p* (when fitted at the wheel brake) where the force P* or the pressure p* corresponds to a braking force of B* = 0,5·g·GBo.
p* (s'il est installé sur le frein de roue) lorsque la force P* ou la pression p* correspondent à une force de freinage de B* = 0,5 .