When an aircraft has sustained damage, the aircraft shall be allowed to resume its flight, if:
the state of design and the state of manufacture inform the state of registry that the aircraft is still airworthy
the state of manufacture informs the state of registry that the damage sustained is of a nature such that the aircraft is still airworthy
the state of registry, the state of design and the state of manufacture consider that the aircraft is still airworthy
the state of registry considers that the damage sustained is of a nature such that the aircraft is still airworthy