7.8.2 Recommendation.— In areas of high latitude where it is determined by the appropriate authority that reference to
Magnetic North is impractical, another suitable reference, i.e. True North or Grid North, should be used.
7.8.3 Where bearings, tracks or radials are given with reference to True North or Grid North, this shall be clearly
indicated. When Grid North is used, its reference grid meridian shall be identified.