588.4—Definitions.

Factory-installed built-in child restraint system is used as defined in S4 of 49 CFR 571.213.
Owners include purchasers.
Registration form means the form provided with a child restraint system in compliance with the requirements of 49 CFR 571.213, 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.