From our manual:
- The fasten seat belt sign must be switched on
- The no smoking sign must be switched on
- B737 only: at least one cockpit crew member must be present in the cockpit.
not required on the 767, 747, MD11
- Cockpit door closed
The Purser must at all times be capable of of handling communications, handling emergency procedures and initiating an evacuation.
Guess we trust our Pursers a little more..... 