From CAAP 233-1 Electronic Flight Bags
7.4.2 All EFB mounts attached to the aircraft structure will require airworthiness approval (Subpart 21.M of the Civil Aviation Safety Regulations 1998). An unsafe condition must not be created when attaching any EFB control yoke attachment/mechanism or mounting device. For example, the weight of the EFB and mounting bracket combination may affect flight control system dynamics, even though the mount alone may be considered light.