Document ID: chunk:federal_register_of_legislation:F2019L00029:body:0:p9
Version: federal_register_of_legislation:F2019L00029
Segment Type: other
Provision Reference: 
Character Range: 24148–26766

data plate affixed by the manufacturer.
4.8. Annex 2 to this Regulation gives examples of arrangements of the approval mark.
5. Specifications
5.1. Definitions (see Annex 3)
5.1.1. The H point is a reference point as defined in paragraph 2.3. of Annex 4 of this Regulation, which must be determined in accordance with the procedure set out in that Annex.
5.1.1.1. Point H' is a reference point corresponding to H as defined in paragraph 5.1.1. which shall be determined for every normal position in which the seat is used.
5.1.1.2. The R point is the seating reference point defined in paragraph 2.4. of Annex 4 of this Regulation.
5.1.2. The three-dimensional reference system is defined in Appendix 2 of Annex 4 of this Regulation.
5.1.3. Points L1 and L2 are the lower effective belt anchorages.
5.1.4. Point C is a point situated 450 mm vertically above the R point. However, if the distance S as defined in paragraph 5.1.6. is not less than 280 mm and if the alternative formula BR = 260 mm + 0.8 S specified in paragraph 5.4.3.3. is chosen by the manufacturer, the vertical distance between C and R shall be 500 mm.
5.1.5. The angles α1 and α2 are respectively the angles between a horizontal plane and planes perpendicular to the median vertical longitudinal plane of the seat and passing through the R-point and the points L1 and L2.
If the seat is adjustable, this requirement shall be fulfilled also for the H-points of all normal driving or riding positions, as indicated by the vehicle manufacturer.
5.1.6. S is the distance in millimetres of the effective upper belt anchorages from a reference plane P parallel to the longitudinal median plane of the vehicle defined as follows:
5.1.6.1. If the seating position is well-defined by the shape of the seat, the plane P shall be the median plane of this seat.
5.1.6.2. In the absence of a well-defined position:
5.1.6.2.1. The plane P for the driver's seat is a vertical plane parallel to the median longitudinal plane of the vehicle which passes through the centre of the steering-wheel in the plane of the steering-wheel rim when the steering-wheel, if adjustable, is in its central position.
5.1.6.2.2. The plane P for the front outboard passenger shall be symmetrical with that of the driver.
5.1.6.2.3. The plane P for the rear outboard seating position shall be that specified by the manufacturer on condition the following limits for distance A between the longitudinal median plane of the vehicle and plane P are respected:
A Is equal or more than 200 mm if the bench seat has been designed to accommodate two passengers only,
A Is equal or more than