You are correct with a caveat.
The current ban in the States is for import, export and sales, of anything e-cig related. Which in my understanding can be stopped at the border and seized by FDA gurus, if they so desire, because the stay on Judge Leon's ruling from the appellate court has once again authorised the FDA through US customs to seize shipments, at the border.
Once across the US border, then Canada Customs only has authority to refuse access into the country of any nicotine containing product, and not seize perse. To date these have been returned to their origin as far as I can tell from what has been reported. It is also my understanding that packeges that have been inspected, were received by the recipient being fully aware the package was inspected e.g stamps etc... or note inside the package.
At present, many shipments that contain batteries are being refused exit from China. That is being done on their soil, by their Custom Agents, because of the refusal of certain carriers, to transport such packages.
Now we do not know all the different political angles being played here, but I believe one can safely assume that things will get much worse, before they get better. Seevral US vendors no longer ship to us.
An annecdote:
We do not know the pressure that is being applied in China wrt batteries etc... on planes. We also do not know if they have a current in house policy wrt shipping batteries etc... We also do not know of personal liabilities for vendors who circumvent the system or current regulation e.g that an illegal export has caused X damage to X amount of goods etc... that the carrier would be responsible for, but eventually the vendor if he/she has broken some law.
There is a lot of intangibles at play here IMHO and more than meets the eye or reported. However, reports are filtering through.
