; and (B) includes a child restraint system that may be— (i) converted between rear-facing with an internal harness and forward-facing with an internal harness; and (ii) commonly referred to as 3-in-1 or all-in-1 seats. (6) Test dummy The term test dummy means an anthropomorphic test dummy as such term is used in section 571.213 of title 49, Code of Federal Regulations (as in effect on the date of the enactment of this section). (7) Tether system The term tether system means a system utilizing a tether anchorage, tether strap, and tether hook (as such terms are defined in section 571.225 of title 49, Code of Federal Regulations).