Care shall be taken to ensure that the cargo is sufficiently
inhibited to prevent self-reaction (e.g. polymerization or dimerization)
at all times during the voyage. Ships shall be provided with a certificate
from the manufacturer stating:
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.1 name and amount of inhibitor added;
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.2 date inhibitor was added and the normally expected
duration of its effectiveness;
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.3 any temperature limitations affecting the inhibitor;
and
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.4 the action to be taken should the length of
the voyage exceed the effective lifetime of the inhibitors.