ANNEX I Average specific CO2 emissions, specific CO2 emissions targets and excess CO2 emissions

1. VEHICLE SUB-GROUPS
Each new heavy-duty vehicle shall be attributed to one of the vehicle sub-groups defined in Table 1 in accordance with the conditions set out therein.

Table 1
Vehicle sub-groups (sg)
Heavy-duty vehicles	Cab type	Engine power	Vehicle sub-group (sg)
Rigid lorries with axle configuration 4 × 2 and technically permissible maximum laden mass > 16 tonnes	All	< 170 kW	4-UD
	Day cab	≥ 170 kW	4-RD
	Sleeper cab	≥ 170 kW and < 265 kW	
	Sleeper cab	≥ 265 kW	4-LH
Rigid lorries with axle configuration 6 × 2	Day cab	All	9-RD
	Sleeper cab		9-LH
Tractors with axle configuration 4 × 2 and technically permissible maximum laden mass > 16 tonnes	Day cab	All	5-RD
	Sleeper cab	< 265 kW	
	Sleeper cab	≥ 265 kW	5-LH
Tractors with axle configuration 6 × 2	Day cab	All	10-RD
	Sleeper cab		10-LH
‘Sleeper cab’ means a type of cab that has a compartment behind the driver’s seat intended to be used for sleeping as reported in accordance with Regulation (EU) 2018/956.
‘Day cab’ means a type of cab that is not a sleeper cab.
If a new heavy-duty vehicle cannot be attributed to a vehicle sub-group because information on the cab type or engine power is not available, it shall be attributed to the long-haul (LH) vehicle sub-group corresponding to its chassis type (rigid lorry or tractor) and axle configuration (4 × 2 or 6 × 2).
Where a new heavy-duty vehicle is attributed to vehicle sub-group 4-UD, but data on the CO2 emissions in g/km are not available for the UDL or UDR mission profiles as defined in Table 2 of point 2.1, the new heavy-duty vehicle shall be attributed to vehicle sub-group 4-RD.