The basis of this work lies in earlier reviews by ISO and the European Experimental Safety Committee which both recommend a set of requirements to assess the biofidelity of a midsize male side impact dummy. The results of this work are biofidelity targets for head, neck, thorax, shoulders, pelvis and abdomen that can be used to assess the biofidelity of the dummies in side impact and to derive calibration procedures. At a worldwide level, the recommendations have been discussed in the frame of the IHRA Biomechanics working group (International Harmonized Research Agenda) and are part of a new worldwide harmonised biofidelic requirements for side impact, applied for the advanced, harmonized side impact dummy WorldSID. The requirements will form a reference for both governments and the automotive industry (the end-users) regarding human impact behavior in side impact, the main benefits being that this set will be globally agreed upon and considered state-of-the-art in biomechanics. Application in other transport sectors concerned about occupant safety (such as aerospace and rail) is feasible.