【多选题】
A Instruction: The recipient has to follow this message unless there is contradictory safety reasons which have to be reported to the sender.
B Advice: The decision whether to follow it stays with the recipient, but one should consider it very carefully.
C Warning: The recipient of a warning should pay immediate attention to the danger mentioned. Consequences of a warning will be up to the sender.
D Information: Consequences of an information will be up to the recipient.
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