Interpretation ID: nht93-7.3

DATE: October 1, 1993

FROM: John Womack -- Acting Chief Counsel, NHTSA; Stephen P. Wood

TO: Docket Section (Redbook, Standard No. 208)

TITLE: Interpretation of Standard No. 208

TEXT:

At the request of the Office of Vehicle Safety Compliance (OVSC), this provides, for the public docket, an interpretation of the requirements of S7.1.1 and S7.1.1.1 of Standard No. 208, Occupant Crash Protection. OVSC asked us to address whether these sections require safety belts at the driver's position of vans to fit around a 95th percentile male dummy when the driver's seat is in the full forward position. As discussed below, the answer to that question is yes.

The general structure of S7.1.1 through S7.1.1.2 is that S7.1.1 sets forth requirements for seat belt assemblies that apply except as those requirements are modified in S7.1.1.1 and S7.1.1.2. S7.1.1.1 modifies S7.1.1 with respect to the range of people that must be fit, but not with respect to the range of seating positions in which that fit must be provided. S7.1.1 provides:

S7.1.1 Except as specified in S7.1.1.1 and S7.1.1.2, the lap belt of any seat belt assembly furnished in accordance with S4.1.2 shall adjust by means of any emergency-locking or automatic-locking retractor that conforms to S571.209 to fit persons whose dimensions range from those of a 50th percentile 6-year-old child to those of a 95th percentile adult male and the upper torso restraint shall adjust by means of an emergency-locking retractor or a manual adjusting device that conforms to S571.209 to fit persons whose dimensions range from those of a 5th percentile adult female to those of a 95th percentile adult male, with the seat in ANY POSITION, the seat back in the manufacturer's nominal design riding position, and any adjustable anchorages adjusted to the manufacturer's nominal design position for a 50th percentile adult male occupant. . . . (Emphasis added.)

Thus, except as modified in S7.1.1.1 and S7.1.1.2, the lap belt and upper torso restraint of any seat belt assembly must meet all the requirements of S7.1.1. More specifically, the lap belt must adjust to fit persons whose dimensions range from those of a 50th percentile 6-year old child to those of a 95th percentile adult male, and the upper torso restraint must adjust to fit persons whose dimensions range from those of a 5th percentile adult female to a 95th percentile adult male, with the seat in any position.

S7.1.1.1 makes a limited modification to S7.1.1's requirements for seat belt assemblies at the driver's seating position; S7.1.1.2 is not relevant to that seating position. Section S7.1.1.1 provides:

S7.1.1.1 A seat belt assembly installed at the driver's seating position shall adjust to fit persons whose dimensions range from those of a 5th-percentile adult female to those of a 95th-percentile adult male.

S7.1.1.1 is significant in what it addresses and what it does not address. It does address the lap belt for the driver's seating position and as to that belt, the range of occupant sizes which must be fit. For the driver's seating position, the general requirement that the lap belt of any seat belt assembly must adjust to fit persons whose dimensions range from those of a 50th percentile 6-year-old to those of a 95th percentile male is modified by S7.1.1.1 to apply to persons whose dimensions range from those of a 5th-percentile adult female to those of a 95th percentile adult male. However, S7.1.1.1 does not address the range of seating positions in which seat belt fit must be provided and thus makes no change in S7.1.1 with respect to that range.

Therefore, S7.1.1 and S7.1.1.1 together require, for seat belt assemblies at the driver seating position, that the lap belt and upper torso restraint must adjust to fit persons whose dimensions range from those of a 5th percentile adult female to a 95th percentile adult male, with the seat in any position.

The use of the term "any" merits special emphasis. With respect to the requirement that safety belts must fit the specified range of occupant sizes with the seat in "any position," the term "any," when used in connection with a set of items, is specifically defined at 49 CFR 571.4 as meaning the totality of that set of items, any one of which may be selected by the Administration for testing. Therefore, safety belts at the driver's position of vans must fit a 95th percentile male dummy with the seat in all possible positions, including the full forward position.