F1ANNEX IISCOPE, DEFINITIONS AND REQUIREMENTS FOR VEHICLES IN CATEGORY M1
3.Requirements
3.4.
Height of head restraints
3.4.1.
The height of head restraints shall be measured as described in Paragraph 5 of Appendix 1.
3.4.2.
3.4.3.
For head restraints adjustable for height:
3.4.3.1.
3.4.3.2.
there shall be no use position resulting in a height of less than 750 mm21;
3.4.3.3.
in the case of seats other than the front seats the head restraints may be such that they can be displaced to a position resulting in a height of less than 750 mm21, provided that such position is clearly recognisable to the occupant as not being intended for the use of the head restraint;
3.4.3.4.
in the case of front seats head restraints may be such that they can be automatically displaced when the seat is not occupied, to a position resulting in a height of less than 750 mm21, provided that they automatically return to the position of use when the seat is occupied.
3.4.4.
The dimensions mentioned in paragraphs 3.4.2 and 3.4.3.1 above may be reduced to leave adequate clearance between the head restraint and the interior surface of the roof, the windows or any part of the vehicle structure; however, the clearance shall not exceed 25 mm. In the case of seats fitted with displacement and/or adjustment systems, this shall apply to all seat positions. Furthermore, by way of derogation from paragraph 3.4.3.2, there shall not be any use position resulting in a height lower than 700 mm.
3.4.5.
By derogation to the height requirements mentioned in Paragraphs 3.4.2, 3.4.3.1 and 3.4.3.2, the height of any head restraint designed to be provided in rear centre seats or seating positions shall be not less than 700 mm.
Substituted by Commission Directive 96/37/EC of 17 June 1996 adapting to technical progress Council Directive 74/408/EEC relating to the interior fittings of motor vehicles (strength of seats and of their anchorages) (Text with EEA relevance).