This read-create boolean, when true, indicates this interface is configured to use interface-specific label space for MPLS rather than the platform-wide label space used when this value is false. It matters because interface-specific label space isolates label allocation to just this link, which can be required for certain ATM or Frame Relay label-switching implementations with limited label ranges. An administrator configuring MPLS over an ATM interface with cell-mode label constraints would set csMplsInterfaceUseInterfaceLabels to true so labels are allocated per-interface rather than from the shared platform pool.