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1. The sender of an item shall be liable for injuries caused to postal officials and for any damage caused to other postal items and postal equipment, as a result of the dispatch of articles not acceptable for conveyance or the non-observance of the conditions of acceptance.
2. In the case of damage to other postal items, the sender shall be liable for each item damaged within the same limits as designated operators.
3. The sender shall remain liable even if the office of posting accepts such an item.
4. However, where the conditions of acceptance have been observed by the sender, the sender shall not be liable, in so far as there has been fault or negligence in handling the item on the part of designated operators or carriers, after acceptance.