Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p17
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 49208–52139

the ignition locking system is in the "On" ("Run") position or the propulsion system is activated.
         7.1.7. Identification of hydrogen fuelled vehicles.
         On vehicles of the categories M2/N2 and M3/N3, equipped with a compressed hydrogen system, labels shall be installed as specified in Annex 6.
         These labels shall be placed on the front of the vehicle and on the left side as well as on the right side of the vehicle; for the side in vicinity of a front door, if available. If there is no front door available, the label must be placed on the first third of the vehicle length. In addition, for vehicles of category M2 and M3, a label shall be fixed to the rear of the vehicle.
         7.2. Post-crash fuel system integrity
         The vehicle fuel system shall comply with the following requirements after the vehicle crash tests in accordance with the following Regulations by also applying the test procedures prescribed in Annex 5 of this Regulation.
              (a) Frontal impact test in accordance with either Regulation No. 12, or Regulation No. 94; and
              (b) Lateral impact test in accordance with Regulation No. 95.
         In case that one or both of the vehicle crash tests specified above are not applicable to the vehicle, the vehicle fuel system shall, instead, be subject to the relevant alternative accelerations specified below and the hydrogen storage system shall be installed in a position satisfying the requirements in paragraph 7.2.4. The accelerations shall be measured at the location where the hydrogen storage system is installed. The vehicle fuel system shall be mounted and fixed on the representative part of the vehicle. The mass used shall be representative for a fully equipped and filled container or container assembly.
         Accelerations for vehicles of categories M1 and N1:
              (a) 20 g in the direction of travel (forward and rearward direction);
              (b) 8 g horizontally perpendicular to the direction of travel (to left and right).
         Accelerations for vehicles of categories M2 and N2:
              (a) 10 g in the direction of travel (forward and rearward direction);
              (b) 5 g horizontally perpendicular to the direction of travel (to left and right).
         Accelerations for vehicles of categories M3 and N3:
              (a) 6.6 g in the direction of travel (forward and rearward direction);
              (b) 5 g horizontally perpendicular to the direction of travel (to left and right).
         7.2.1. Fuel leakage limit
         The volumetric flow of hydrogen gas leakage shall not exceed an average of 118 Nl per minute for the time interval, Δt, as determined in accordance with Annex 5, paragraph 1.1. or 1.2.

         7.2.2. Concentration limit in enclosed spaces
         Hydrogen gas leakage shall not result in a hydrogen concentration in the air greater than 4.0 per cent by volume