The NLIS maintenance occurs on every second Thursday from 6-8pm (AEDT) and selected Saturdays between 10am-8pm (AEDT).
Please note that parts of the NLIS system may still be accessible during these times with some level of degradation in performance. There may also be a complete outage depending on the type of system or database enhancement being carried out.
For more information, please visit NLIS Support.