“82. One situation that can sometimes cause difficulties is when the taxpayer’s asserted reasonable excuse is purely that he/she did not know of the particular requirement that has been shown to have been breached. It is a much-cited aphorism that ‘ignorance of the law is no excuse’, and on occasion this has been given as a reason why the defence of reasonable excuse cannot be available in such circumstances. We see no basis for this argument. Some requirements of the law are well-known, simple and straightforward but others are much less so. It will be a matter of judgment for the FTT in each case whether it was objectively reasonable for the particular taxpayer, in the circumstances of the case, to have been ignorant of the requirement in question, and for how long.”
“In summary, it seems to me that the alleged special circumstances must be an unusual event or situation which does not amount to a reasonable excuse but which renders the penalty in whole or part significantly unfair and contrary to what Parliament must have intended when enacting the provisions”