ARO.RAMP.140 Grounding of aircraft

(a) In the case of a category 3 finding where it appears that the aircraft is intended or is likely to be flown without completion by the operator or owner of the appropriate corrective action, the CAA shall:

(1)  notify the pilot-in-command/commander or the operator that the aircraft is not permitted to commence the flight until further notice; and

(2)  ground that aircraft.

(b) The CAA shall immediately inform the aviation authority of the State of the operator and of the State in which the aircraft is registered, if relevant [...].

(c) The CAA shall, in coordination with the State of the operator or the State of Registry, prescribe the necessary conditions under which the aircraft can be allowed to take-off.

(d) If the non-compliance affects the validity of the certificate of airworthiness of the aircraft, the grounding shall only be lifted by the CAA when the operator shows evidence that:

(1)  compliance with the applicable requirements has been re-established;

[...]

(3)   a permit-to-fly or equivalent document of the State of Registry or the State of the operator [...]; and

(4)  permission from third countries which will be overflown, if applicable.