1. Mark N Gasson is Visiting Research Fellow, School of Systems Engineering, University of Reading, UK.
2. Bert-Jaap Koops is Professor of Regulation and Technology, TILT—Tilburg Institute for Law, Technology, and Society, Tilburg University (The Netherlands). The research leading to this paper received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no 289092 (RoboLaw). All websites accessed 20 July 2013.