This read-create RowStatus object governs the row in ifStackTable that records a layering relationship between two sub-layers, such as a VLAN interface sitting on top of a physical port. Because moving a row from active to notInService or destroy can ripple effects up and down the whole interface stack, many agents restrict or disallow write access to it for certain interface types. For example, deleting a row here is how an agent models unstacking a VLAN subinterface from the physical Ethernet port it was riding on.