Artikel 22

1. When the sender hands goods of a dangerous nature to the carrier, he shall inform the carrier of the exact nature of the danger and indicate, if necessary, the precautions to be taken. If this information has not been entered in the consignment note, the burden of proving, by some other means, that the carrier knew the exact nature of the danger constituted by the carriage of the said goods shall rest upon the sender or the consignee.
2. Goods of a dangerous nature which, in the circumstances referred to in paragraph 1 of this article, the carrier did not know were dangerous, may, at any time or place, be unloaded, destroyed or rendered harmless by the carrier without compensation; further, the sender shall be liable for all expenses, loss or damage arising out of their handing over for carriage or of their carriage.