90 The difficulty for the respondent is that there were here a series of mistakes, the one to which Olsson AUJ referred, the actual decision to rely on the information with which he had been provided, and the actual reliance, by fishing in the embargoed waters. The last is a different mistake from, for example, a mistake as to the location of his vessel or his lobster pots. The last, it can be seen, is discrete in time, place and physical activity from the other two, although but for them it is unlikely that it would have been made. The offence of which the respondent was convicted was not of failing to obtain, or hold and rely on complete and accurate materials, but of fishing where professional fishing was impermissible. The elements of the offence consisted of fishing in the embargoed waters, an activity which the respondent knew to be proscribed. Unfortunately, in the circumstances he could be no less guilty than a motorist who has done everything reasonably possible to ascertain the speed limits on a stretch of roadway along which he is to travel but having failed to do so, in one or more instances, exceeds those limits because he was unaware of them.
21 The example which their Honours used is exactly this case. The defendants each exceeded the speed limit which they said they were not aware of, for reasons which her Honour accepted amounted to honest and reasonable mistakes. There is no question that the defendants knew that driving above the legal limit was illegal, their only mistake was as to what the legal limit was. The plaintiff challenges whether the conclusion that there had been any honest and reasonable mistake as to the speed limit was open on the evidence. Accepting for the moment that it was, given that the elements of the offence are established when a driver drives at a speed in excess of the applicable limit, failing to observe the limit only because the defendants mistakenly believed that the limit was higher than it in fact was, amounts to an error of law, not one of fact, on their Honour's approach.
22 Given this conclusion, it follows that the appeals must be upheld and the matters returned to the Local Court for further hearing. It is unnecessary to consider the second limb of the appeal, which was that her Honour erred in approaching the question of honest and reasonable mistake. That defence was not one available to the defendants, given that theirs were mistakes of law, not mistakes of fact. The plaintiff accepted that the matters which the defendants wished to rely on, to explain how they came to a mistaken belief as to the applicable speed limit, will be relevant to the questions of whether any penalty should be imposed for the offences in question and if so, what penalty. Those matters do not, however, require this Court's consideration.