Proposal in the framework of the process of splitting the UN R125 into two separate UN Regulations and a new UN Regulation concerning Field of Vision Assistants. This proposal includes updates of references to the three-dimensional H-point (3-D “H”-point) measurement and calibration procedure (per the update and transfer of the device specification from the Consolidated Resolution on the Construction of Vehicles (R.E.3) to Mutual Resolution No. 1 (M.R.1).