Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p18
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 51878–54959

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 in the passenger and luggage compartments (Annex 5, paragraph 2. test procedures). The requirement is satisfied if it is confirmed that the shut-off valve of the storage system has closed within 5 seconds of the crash and no leakage from the storage system.
         7.2.3. Container Displacement
         The storage container(s) shall remain attached to the vehicle at a minimum of one attachment point.
         7.2.4. Additional installation requirements
         7.2.4.1. Requirements on installation of the hydrogen storage system not subject to the frontal impact test:
         The container shall be mounted in a position which is rearward of a vertical plane perpendicular to the centre line of the vehicle and located 420 mm rearward from the front edge of the vehicle.
         7.2.4.2. Requirements on installation of the hydrogen storage system not subject to the lateral impact test:
         The container shall be mounted in a position which is between the two vertical planes parallel to the centre line of the vehicle located 200 mm inside from the both outermost edge of the vehicle in the proximity of its container(s).
8.             Modification of type and extension of approval
         8.1. Every modification to an existing type of vehicle or hydrogen storage system or specific component for hydrogen storage system shall be notified to the Type Approval Authority which approved that type. The Authority shall then either:
              (a) Decide, in consultation with the manufacturer, that a new type-approval is to be granted; or
              (b) Apply the procedure contained in paragraph 8.1.1. (Revision) and, if applicable, the procedure contained in paragraph 8.1.2. (Extension).
         8.1.1. Revision
         When particulars recorded in the information documents of Annex 1 have changed and the Type Approval Authority considers that the modifications made are unlikely to have an appreciable adverse effect and that in any case the vehicle/hydrogen storage system/specific component still meets the requirements, the modification shall be designated a "revision".
         In such a case, the Type Approval Authority shall issue the revised pages of the information documents of Annex 1 as necessary, marking each revised page to show clearly the nature of the modification and the date of re-issue. A consolidated, updated version of the information documents of Annex 1, accompanied by a detailed description of the modification, shall be deemed to meet this requirement.
         8.1.2. Extension
         The modification shall be designated an "extension" if, in addition to the change of the particulars recorded in the information folder,
              (a) Further inspections or tests are required; or
              (b) Any information on the communication document