For bagudvendende barnefastholdelsesanordninger sikres korrekt placering af anordningens overside i forhold til barneattrappens hoved ved at isætte den største attrap, anordningen er specificeret til, i den mest tilbagelænede udformning og sørge for, at en vandret linje i øjenhøjde er lavere end sædets overkant.
For rearward-facing child restraints the correct position of the top of the restraint relative to the child dummy head is ensured by installing the largest dummy, for which the device was specified, in the most reclined configuration, and making sure that a horizontal line at the eye height passes below the top of the seat.