Division (b) A flight plan shall be submitted prior to operating:

any flight or portion thereof to be provided with air traffic control service;

any IFR flight within advisory airspace;

any flight within or into areas, or along routes designated by the competent authority, to facilitate the provision of flight information, alerting and search and rescue services;

any flight within or into areas or along routes designated by the competent authority, to facilitate coordination with appropriate military units or with air traffic services units in adjacent States in order to avoid the possible need for interception for the purpose of identification;

any flight across international borders, unless otherwise prescribed by the States concerned;

any flight planned to operate at night, if leaving the vicinity of an aerodrome.