This read-create Integer32 (0-65535) references the ID of an access-list entry from csOrionGenAclTable, so that all packets transmitted or received on any virtual interface of this virtual router matching that ACL are acted on by this DSCP/TOS-marking filter. An admin uses it to bind a specific traffic-classification rule to a byte-rewriting action at the whole-VR level. For example, setting this to ACL 20, which matches VoIP traffic, ties this filter's marking action to every packet across the VR's interfaces that matches that ACL.