Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p18
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 50517–53374

auxiliary, vehicle mounted, equipment;

2.52. "Qualified deteriorated component or system (QDC) " means a component or a system that has been intentionally deteriorated such as by accelerated ageing or by having been manipulated in a controlled manner and which has been accepted by the Type Approval Authority according to the provisions set out in Annex 9B to this Regulation for use when demonstrating the OBD performance of the engine system
2.53. "Reagent" means any medium that is stored on-board the vehicle in a tank and provided to the exhaust after-treatment system (if required) upon request of the emission control system;
2.54. "Recalibration" means a fine tuning of a natural gas engine in order to provide the same performance (power, fuel consumption) in a different range of natural gas;

2.55.  "Reference mass" means the mass of the vehicle in running order less the uniform mass of the driver of 75 kg and increased by a uniform mass of 100 kg;
2.56. "Replacement pollution control device" means a pollution control device or an assembly of such devices intended to replace an original pollution control device and which can be approved as a separate technical unit;
              2.57. "Scan-tool" means external test equipment used for standardised off-board communication with the OBD system in accordance with the requirements of this Regulation;

2.58. "Service accumulation schedule" means the ageing cycle and the service accumulation period for determining the deterioration factors for the engine-after-treatment system family;
2.59. "Service mode" means a special mode of a dual-fuel engine that is activated for the purpose of repairing, or of moving the vehicle from the traffic when operation in the dual-fuel mode is not possible[5].
2.60. "Tailpipe emissions" means the emission of gaseous and particulate pollutants;
2.61. "Tampering" means inactivation, adjustment or modification of the vehicle emissions control or propulsion system, including any software or other logical control elements of those systems, that has the effect, whether intended or not, of worsening the emissions performance of the vehicle;
2.62. "Unladen mass" means the mass of the vehicle in running order without the uniform mass of the driver of 75 kg, passengers or load, but with the fuel tank 90 per cent full and the usual set of tools and spare wheel on board, where applicable;
2.63. "useful life" means the relevant period of distance and/or time over which compliance with the relevant gaseous and particulate emission limits has to be assured;
2.64. "Vehicle type with regard to emissions" means a group of vehicles which do not differ in essential engine and vehicle characteristics as set out in Annex 1;
2.65. "Wall flow Diesel Particulate Filter" means a Diesel Particulate Filter ("DPF") in which all the exhaust gas is forced to