It's become clear that the West Antarctic Ice Sheet, much of which sits on land that's actually below sea level, is one of the most vulnerable in the world to these types of rapid breakdowns.
In the case of drawback, the rules are clear, and no monies are paid until a claim is approved. In the case of the duties relief program, the terms are clearly set out in regulations. CBSA does not impose penalties against companies who act in good faith on CBSA advice.