Why should old or previously used placards be removed from a vehicle before it is reloaded with a different, non-matching hazardous material?

Pick an answer

1. It does not matter as long as the shipping papers are correct
2. Leftover placards from a previous load could mislead responders about the vehicle's current cargo
3. Removing old placards is required only once a year
4. Old placards are always automatically updated by the vehicle itself when the load changes overnight

Correct!

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