Pretty much every firm that has faced these charges this year has looked into this defence in some detail.
To summarise, the charge of importation of a border-controlled substance, 307.4 of the Commonwealth Criminal Code states
I assume that because of the $1500 fine the CDPP is offering as a sentence, your charges relate to importation without commercial intent which is 307.4.
The Federal charge of importation carries with it a fault element of "recklessness". This means the Commonwealth Prosecutor only has to prove from the evidence that the defendant was "reckless" as to whether the substance being imported was a prohibited substance. Keeping in mind how convoluted analogue legislation is, and practically impossible for the lay person to understand, common sense would suggest that there is a good case for arguing the defendant made a genuine mistake.
Nevertheless, if you do decide to follow this line of defence, you can expect it to cost you a lot more money and the Commonwealth prosecutors will throw everything at you because they have already secured guilty pleas in these exact situations and will not want them being challenged.
While I'm not aware of any similar matters of mistake of fact vs mistake of law in regards to drugs,
this post detailing a High Court ruling is a must read for any lawyer interested in this defence. My instinct is that a judge ruling on this defence would be likely to determine it as a mistake of law, and therefore not a valid defence.
If the verdict is guilty, the defendant
will receive a conviction. In Federal sentencing, any sentence above a bond carries a mandatory conviction, this is non-negotiable unless you can negotiate a bond for a sentence.
Please get the best counsel you can afford and best of luck.
What makes you think this system is supposed to be fair? The legal process, especially in these cases, is simply a political exercise. The AFP and the CDPP are simply acting out in response to media attention, making headlines to reassure the public that "something is being done". It has nothing to do with any proven dangers of the substance involved, nothing to do with striking a blow to major organised crime and cares nothing about the consequences of imposing a drug importation conviction on someone who was not dealing and may genuinely have acted in good spirit to determine the substance's legality.
Does fairness really matter as much as securing convictions in an election year?
Do you think the AFP Assistant Commissioner and the Commonwealth prosecutors in these operations actually sit around and debate whether these prosecutions are just?