A cover for an inflatable bag or cushion type retaining device, in particular a lateral one, including at least a body, a mechanism for retaining the body and a mechanism for fixing the body, directly or indirectly, to the bodywork of a vehicle. The diaper includes a first set of contacts and a second set of contacts which are constituted by conductive material. The rear panel defines a horizontal opening and an engaging portion. Image reproduction quality is maintained in an electrostatic reproduction device even as the width of the copy substrate changes and in the presence of end leakage current effect. The resource plan may indicate an amount of resources required for each contact channel for each of the plurality of time periods in the season. At least some embodiments involve detecting a vehicle has been in a collision, establishing a geo-fence boundary for the vehicle responsive to the detecting, monitoring a movement of the vehicle with respect to the geo-fence boundary, and issuing an alert if movement of the vehicle outside the geo-fence boundary is indicative of improperly departing a scene of the collision.