Division 2.7.1 F1

Dual-fuel engines and vehicles shall comply with the following additional requirements:

1. 2.7.1.1.

   A PEMS tests shall be performed in dual-fuel mode.

2. 2.7.1.2.

   In the case of Type 1B, Type 2B and Type 3B dual-fuel engines, an additional PEMS test shall be performed in Diesel mode on the same engine and vehicle immediately after, or before, a PEMS test is performed in dual-fuel mode.

   In that case, the pass or fail decision of the lot considered in the statistical procedure specified in this Annex shall be based on the following:

   1. (a)

      a pass decision is reached for an individual vehicle if both the PEMS test in dual-fuel mode and the PEMS test in Diesel mode have concluded a pass;

   2. (b)

      a fail decision is reached for an individual vehicle if either the PEMS test in dual-fuel mode or the PEMS test in Diesel mode has concluded a fail.