What are acceptable methods for determining the Seating Reference Plane (SRP)?
For a rear seat designed for 2 seating positions, consistent with the ADR definition of SRP, in the absence of information from the original vehicle manufacturer to the contrary, the longitudinal vertical plane through the geometric centre of the seating position is acceptable as the SRP. In any case the SRP “shall be at least 200 mm from the vertical longitudinal plane through the centre of the vehicle and at least 200 mm from the inner panel (or the line of the inner panel) when measured horizontally on a transverse line through the ‘Seating Reference Point’. For a rear seat with 3 seating positions (as determined in accordance with ADR 5/..
