Reading "[Long Range Aircraft-AEA Requirements]"[Long Range Aircraft-AEA Requirements].
In appendix, Para 1.2 "Definitions and specifications"Definitions and specifications, the definition for "Payload" states
"Payload should be the Volume Limited Payload (...) or the Maximum Zero Fuel Weight limited payload, whichever is the lesser."
Payload should be the Volume Limited Payload (...) or the Maximum Zero Fuel Weight limited payload, whichever is the lesser.
How can we can define and understand "Maximum Zero Fuel Weight limited payload"?