Document ID: chunk:federal_register_of_legislation:F2017L01344:body:0:p15
Version: federal_register_of_legislation:F2017L01344
Segment Type: other
Provision Reference: 
Character Range: 38685–41355

paragraph 6.6. below, the head restraint shall cover an area extending not less than 85 mm to each side of the vertical median plane of the seat for which the head restraint is intended.
5.12. The head restraint and its anchorage shall be such that the maximum backward displacement X of the head permitted by the head restraint and measured in conformity with the static procedure laid down in paragraph 6.4.3. below, is less than 102 mm.
5.13. The head restraint and its anchorage shall be strong enough to bear without breakage the load specified in paragraph 6.4.3.6. below. In the case of head restraints integral with the seat‑back, the requirements of this paragraph shall apply to the part of the seat‑back structure situated above a plane perpendicular to the reference line at 540 mm from the R point.
5.14. If the head restraint is adjustable, it shall not be possible to raise it beyond the maximum operational height except by deliberate action on the part of the user distinct from any act necessary for its adjustment.
5.15. The strength of the seat‑back and of its locking devices is deemed to meet the requirements set out in paragraph 6.2. below when, after testing in accordance with paragraph 6.4.3.6. below, no breakage of the seat or seat‑back has occurred; otherwise, it shall be shown that the seat is capable of meeting the test requirements set out in paragraph 6.2. below.
5.16.  Special requirements regarding the protection of occupants from displaced luggage
5.16.1.  Seat-backs
  Seat-backs and/or head restraints located such that they constitute the forward boundary of the luggage compartment, all seats being in place and in the normal position of use as indicated by the manufacturer, shall have sufficient strength to protect the occupants from displaced luggage in a frontal impact. This requirement is deemed to be met if, during and after the test described in Annex 9, the seat-backs remain in position and the locking mechanisms remain in place. However, the deformation of the seat-backs and their fastenings during the test is permitted, provided that the forward contour of the parts of the tested seat-back and/or head restraints, that are harder than 50 Shore A, does not move forward of a transverse vertical plane which passes through:
(a) A point of 150 mm forward of the R point of the seat in question, for the parts of the head restraint;
(b) A point of 100 mm forward of the R point of the seat in question, for parts of the seat-back;
Excluding the rebound phases of the test blocks.
For integrated head restraints, the limit between the head restraint and the seat-back is defined by the plane perpendicular to the