Mercy Flight:
During situations like these, pilots can declare a 'mercy flight'. A mercy flight commonly involves an urgent need to:
transport someone who needs lifesaving medical help
evacuate someone from an emergency such as a flood or fire.
Basically, if a passenger is dying and needs urgent transport - PIC can declare a mercy flight to transport the passenger. Im not sure what the question was, but if its who is responsible for declaring a mercy flight, its the PIC.
Dropping:
CAO 29.5.3 says you need explicit CASA permission if you are dropping anything "within a control zone, within an aircraft lane of entry, or within 5 miles of a Government or licensed aerodrome". So permission, "Yes" if you are in the control zone or want to drop flour bombs within 5 nm of a licensed aerodrome. Need CASA approval - if not anywhere near an airport, then no, you dont need casa approval.
Windsock symbols -
Not correct, controllers display lights at aircraft in the event of a radio faulure in flight, but this question is not asking that, its referering to the Runway in use and if for example there is Gliding operations in progress amongst other things, see the link below:
www.vfrg.net.au/resources/quick-referenc...f-aerodrome-traffic/
Dangerous Goods:
www.casa.gov.au/operations-safety-and-tr...plesofdangerousgoods
Passenger List:
The pilot in command of each passenger carrying flight must complete a passenger list using the Operational Flight Planning Form
Air law is my fav subject because its open book, I suggest tagging and hughlighting the permittable documents, its quite easy if you understand the question, if you need some help, shoot us a message, happy to