This document specifies the criteria for judgement of usability of child restraint systems (CRSs) when installing them with vehicle seat belts.

This document provides criteria for judgement of:

• ease of availability of instructions;
• clarity of instruction manual and labelling; and
• ease of use of design related features of the CRS related to the installation in a vehicle.

NOTE 1        CRS includes enhanced child restraint systems (ECRS) according to UN Regulation No. 129.

NOTE 2        This procedure can also be used for evaluation of vehicle integrated CRS.

NOTE 3        Booster system usability evaluation is covered by ISO 29061-5.