Question ATPL - Airline Transport Pilot license - Air Law

230 - ATPL - Aircraft wishing to conduct IFR flight within advisory airspace, but not electing to use the air traffic advisory service:

Shall nevertheless submit a flight plan and notify changes made thereto to the ATS unit providing that service

May file a flight plan under pilot's discretion

Need to file a flight plan

Shall nevertheless submit a flight plan but changes made thereto are not necessary to be notified