Seems perfectly obvious to me.

BP allowed to keep using part of oil field:

Exxon Mobil Corp. and ConocoPhillips, BP's partners in the Prudhoe Bay field, have declared a force majeure on oil deliveries from the field. Force majeure allows companies to avoid penalties for failing to fulfill contracts because of unforeseen events.

Look, if you don't inspect the pipes then when the pipes fail it's unforseen!

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