---
kind: "section"
citation: "49 C.F.R. § 588.4"
title: "49"
number: "588.4"
heading: "Definitions."
url: "https://uscodex.org/cfr/49/588.4"
---

# §588.4. Definitions.

- (a) **Statutory definitions.** All terms defined in [section 102](/cfr/49/102.md) of the National Traffic and Motor Vehicle Safety Act ([15 U.S.C. 1391](/usc/15/1391.md)) are used in their statutory meaning.
- (b) **Motor Vehicle Safety Standard definitions.** Unless otherwise indicated, all terms used in this part that are defined in the Motor Vehicle Safety Standards, [part 571](/cfr/49/part571.md) of this subchapter (hereinafter “the Standards”), are used as defined in the Standards.
- (c) **Definitions used in this part.** Child restraint system is used as defined in S4 of [49 CFR 571.213](/cfr/49/571.213.md), Child Restraint Systems.

  Factory-installed built-in child restraint system is used as defined in S4 of [49 CFR 571.213](/cfr/49/571.213.md).

  Owners include purchasers.

  Registration form means the form provided with a child restraint system in compliance with the requirements of [49 CFR 571.213](/cfr/49/571.213.md), and any communication from an owner of a child restraint to the manufacturer that provides the restraint's model name or number and the owner's name and mailing address.


## Notes

### Authority

Authority: 49 U.S.C. 322, 30111, 30115, 30117, and 30166; delegation of authority at 49 CFR 1.50.

### Source

Source: 57 FR 41438, Sept. 10, 1992, unless otherwise noted.