SPANSET's Quality management continually tests materials and end products. They are checked continuously rein SPANSET's own laboratory and rein external testing programmes. This restraint must only be used on school bus seats. Entire seat directly behind must be unoccupied or have restrained occupants.” (The instruction's reference to a “restrained occupant” http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=2953632