Electroencephalography, prolonged recording lasting at least 3 hours, that requires multi‑channel recording using: (a) for a service not associated with a service to which an item in Group T8 applies—standard 10‑20 electrode placement; or (b) for a service associated with a service to which an item in Group T8 applies—either standard 10‑20 electrode placement or a different electrode placement and number of recorded channels; other than a service: (c) associated with a service to which item 11000, 11004 or 11005 applies; or (d) involving quantitative topographic mapping using neurometrics or similar devices.