I couldn’t find a definite answer in the FCOM.
Did find this:
- 160 ft AGL, but that’s without Cat II or III on the FMA
- “If the flight crew performs an automatic approach without autoland, the autopilot must be disengaged no later than at 80 ft AGL.” (For a Cat II approach)
So my answer would be: (unless company SOP's are more restrictive)
You can leave the A/P on and perform an auto land OR disconnect AP no later than 80 ft AGL if not performing an autoland.