When exercising the s 32(4) variation power, the court must balance the degree of likelihood and degree of prejudice to national security against the extent of interference with the administration of justice. A s 26 certificate does not capture statements that merely 'lessen residual ambiguity' in the mind of a speculative reader; the test is whether the statement has a real tendency to suggest protected information is true or untrue, or might directly or indirectly reveal it. General statements about international relationships and hypothetical impacts do not fall within the certificate's scope. Appellate reasons should be published with as few variations as possible, particularly as to core reasoning.
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