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Definition of engine sub-categories referred to in Article 4 Table I-1: Sub-categories of engine category NRE defined in point (1) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power NRE CI variable 0 < P < 8 NRE-v-1 Maximum net power CI 8 ≤ P < 19 NRE-v-2 CI 19 ≤ P < 37 NRE-v-3 CI 37 ≤ P < 56 NRE-v-4 all 56 ≤ P < 130 NRE-v-5 130 ≤ P ≤ 560 NRE-v-6 P > 560 NRE-v-7 CI constant 0 < P < 8 NRE-c-1 Rated net power CI 8 ≤ P < 19 NRE-c-2 CI 19 ≤ P < 37 NRE-c-3 CI 37 ≤ P < 56 NRE-c-4 all 56 ≤ P < 130 NRE-c-5 130 ≤ P ≤ 560 NRE-c-6 P > 560 NRE-c-7 Table I-2: Sub-categories of engine category NRG defined in point (2) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power NRG all variable P > 560 NRG-v-1 Maximum net power constant P > 560 NRG-c-1 Rated net power Table I-3: Sub-categories of engine category NRSh defined in point (3) of Article 4(1) Category Ignition type Speed operation Power range (kW) Swept volume (cm3) Sub-category Reference power NRSh SI variable or constant 0 < P < 19 SV < 50 NRSh-v-1a Maximum net power SV ≥ 50 NRSh-v-1b

Table I-4: Sub-categories of engine category NRS defined in point (4) of Article 4(1) Category Ignition type Speed operation Power range (kW) Swept volume (cm3) Sub-category Reference power NRS SI variable ≥ 3 600 rpm; or constant 0 < P < 19 80 ≤ SV < 225 NRS-vr-1a Maximum net power SV ≥ 225 NRS-vr-1b variable < 3 600 rpm 80 ≤ SV < 225 NRS-vi-1a SV ≥ 225 NRS-vi-1b variable or constant 19 ≤ P < 30 SV ≤ 1 000 NRS-v-2a Maximum net power SV > 1 000 NRS-v-2b 30 ≤ P < 56 any NRS-v-3 Maximum net power For engines < 19 kW with SV < 80 cm3 in machinery other than hand-held machinery, engines of the category NRSh shall be used. Table I-5: Sub-categories of engine category IWP defined in point (5) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power IWP all variable 19 ≤ P < 75 IWP-v-1 Maximum net power 75 ≤ P < 130 IWP-v-2 130 ≤ P < 300 IWP-v-3 P ≥ 300 IWP-v-4 constant 19 ≤ P < 75 IWP-c-1 Rated net power 75 ≤ P < 130 IWP-c-2 130 ≤ P < 300 IWP-c-3 P ≥ 300 IWP-c-4 Table I-6: Sub-categories of engine category IWA defined in point (6) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category

Reference power IWA all variable 19 ≤ P < 75 IWA-v-1 Maximum net power 75 ≤ P < 130 IWA-v-2 130 ≤ P < 300 IWA-v-3 P ≥ 300 IWA-v-4 constant 19 ≤ P < 75 IWA-c-1 Rated net power 75 ≤ P < 130 IWA-c-2 130 ≤ P < 300 IWA-c-3 P ≥ 300 IWA-c-4 Table I-7: Sub-categories of engine category RLL defined in point (7) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power RLL all variable P > 0 RLL-v-1 Maximum net power constant P > 0 RLL-c-1 Rated net power Table I-8: Sub-categories of engine category RLR defined in point (8) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power RLR all variable P > 0 RLR-v-1 Maximum net power constant P > 0 RLR-c-1 Rated net power Table I-9: Sub-categories of engine category SMB defined in point (9) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power SMB SI variable or constant P > 0 SMB-v-1 Maximum net power Table I-10: Sub-categories of engine category ATS defined in point (10) of Article 4(1) Category Ignition type Speed operation Power range (kW) Sub-category Reference power ATS SI variable or constant