For the documentation of fuel-efficient vehicles in Germany, we were wondering if a vehicle meeting the EURO 6 limit is eligible?

Within the guidelines for ACP in Europe for BD+C, it is stated that for SSc4.3, "projects in europe may use the EURO 6 limit values [..] to meet the definition of low-emitting and fuel-efficient vehicles". We just checked the ACP guide for Europe for EB:OM, but there is no information regarding this topic.
Has anyone experience for the documentation of low-emitting vehicles in Europe?

Thanks in advance, Julia