Division 2.4.15 Dual-fuel engines

All engine types within a dual-fuel engine family shall belong to the same type of dual-fuel engines defined in section 2 (for example type 1A, type 2B, etc.), and operate with the same types of fuel or when appropriate with fuels declared according to this Regulation as being of the same range(s).

In addition to belonging to the same dual fuel type, they shall have a maximum gas energy ratio on the applicable test cycle (GER_cycle) within the range 70 to 100 per cent of that of the engine type with the highest GER_cycle.