2.2. When an "H" point and an "actual seat-back angle" are being determined, the seat considered shall be placed in the lowest and most rearward normal driving position or position of use provided for it by the manufacturer. The seat back shall, if its inclination is adjustable, be locked as specified by the manufacturer or, in the absence of any specification, to an actual seat-back angle as near as possible to 25 deg from the vertical. a0c0