Proposal from the Bumper Test Area Task Force to revise the procedure for determining the bumper test area under the pedestrian safety regulation. This proposal corrects shortcomings in the current definitions which could lead to a narrower test area than intended (leading to less effective pedestrian protection). This proposal does not take into account potentially harmful hard structures such as bumper beams that may lie behind the outer contour or front fascia extending beyond the defined bumper corners as consensus within the task force could not be reached. Presented as a Supplement, the proposal includes a September 2017 transition date in case GRSP determines that the changes should be put into a new series of amendments rather than as a supplement.