Hi,
My understanding is that although no vlan tags & no 802.1p bits, packets from access port can be classified into a forwarding class. The default untrusted classifier classifies all access port traffic into Best-Effort forwarding class much like a fixed interface classifier config would do.
The terms used seem to be confusing as well as Table 2, since there's no 802.1p bits in access port traffic.
Cheers,
Ashvin