When handed over for carriage, uncleaned empty tanks shall be filled with a protective agent fulfilling one of the following measures:

+-------------+----------------+-------------------------------------------+
| Protective  | Degree of fil- | Additional requirements for carriage at   |
|   agent     | ling of water  |         low ambient temperatures          |
+-------------+----------------+-------------------------------------------+
| Nitrogen a) |       --       |                                           |
+-------------+----------------+-------------------------------------------+
| Water and   |       --       |                                           |
| nitrogen a) |                |                                           |
+-------------+----------------+-------------------------------------------+
| Water       | not less than  | The water shall contain sufficient anti-  |
|             | 96 % and not   | freeze agent to prevent it from freezing. |
|             | more than 98 % | The anti-freeze agent shall be free from  |
|             |                | corrosive action and not liable to react  |
|             |                | with the substance.                       |
+-------------+----------------+-------------------------------------------+

a) The tank shall be filled with nitrogen in such a way that, even after cooling, the pressure at no time falls below atmospheric pressure. The tank shall be closed in such a way that no leakage of gas occurs.

An additional entry shall be included in the transport document:

"TANK FILLED WITH _______*) IN ACCORDANCE WITH SPECIAL PROVISION TU 16.

__________
*) Indicates the name(s) of the protective agent(s). Where the tank is filled with water, its mass shall be indicated in kg; in the case of nitrogen, its pressure shall be given in MPa or bar."