9A.5 The reference in paragraph 9A.4 to currency does not apply to an aircraft (an exempted aircraft):
(a) during flight — if the navigation database expires because it has not been updated for the requirements of a new AIRAC cycle which commenced during the flight;
or
(b) for a period of not more than 72 hours from the time the navigation computer database expires — but only if currency is not required under the MEL for the aircraft.
9A.6 If an aircraft’s navigation computer database is to be used for the navigation purposesof an exempted aircraft under paragraph 9A.5, then:
(a) before each flight, the computer’s database navigation fixes, and the coordinates, frequencies, status (as applicable), and suitability of navigation facilities, required for the intended route must be verified by approved sources of navigation information other than the navigation computer database itself; and
(b) radio navigation aids that are used for departure, arrival and approach procedures must be tuned in to and identified; and
(c) despite paragraph 9A.5, an RNAV departure, arrival or approach procedure must not be used if it is one that has been changed in the latest AIRAC cycle and the aircraft’s navigation computer database is not current for the change; and
(d) if an aircraft is to commence, or continue, a flight with a navigation computer database that is not current for the AIRAC cycle, the operator or the pilot in command must advise air traffic control before the flight commences, or on first contact during continued flight.
9A.7 For an aircraft:
(a) that is engaged in en route or terminal navigation; and
(b) whose navigation computer database complies with paragraphs 9A.3 and 9A.4;
and
(c) that is not an exempted aircraft under paragraph 9A.5;
each navigation computer database selected track and distance between way points is
to be cross-checked for accuracy and reasonableness by reference to:
(d) current en route and area charts; or
(e) the flight plan; or
(f) the navigation log