Leiser v US USCA US 234 F2nd 648

Leiser was travelling from Frankfurt to Newfoundland, his ticket called for no stop in US but as result of adverse weather conditions the plane was forced to land at Boston. Before any custom officer approached he made arrangement to return to Canada in the next available plane, he failed to declare diamonds in his possession. US accused him for smuggling he was tried and acquitted, but the US brought an action to the diamonds.

The exemption from the requirements of the customs laws of the US accorded merchandise brought into as cargo aboard vessels entering in distress and with no intent that they be un-laden had no application to goods carried on the person of individuals involuntary arriving by air