Proposal to define service life for each region or country of usage based on average vehicle age at recycling point, establish methodologies for calculating deterioration factors for fuel cell hybrid electric vehicles and off-vehicle charging hybrid electric vehicles, exclude traction battery and fuel cell system replacement by default unless practitioners provide detailed justification grounded in empirical field study data or official manufacturer statements concerning durability and replacement practices, and clarify that for Japan, no statistics on service life in kilometres or years are currently available, requiring use of default regional values or peer-reviewed alternatives where Japanese data cannot be obtained.