This bitmask specifies which TLVs (interfaceStatus, portStatus) received in a CCM PDU are validated for format correctness by the Remote MEP state machine but have their actual values ignored and marked 'Absent'. An admin sets this when a remote peer's interface- or port-status TLV content shouldn't influence this MEP's fault detection logic, for example during interoperability with equipment that populates those TLVs inconsistently. It's a targeted way to tolerate a specific remote TLV quirk without disabling CCM validation entirely.