I believe I read that the coal needs to remain stable for 2 or 3 months for rail travel, but it'll need to survive 9 months for export via ship. Obviously, if the processing plant is in a foreign country, they would have their own (possibly much less stringent) requirements.
The combustion concerns don't trouble me at all. We already know that coal processed by the test plant has survived for months, and that was when they were maximizing the BTUs. I have no doubt they can tweak the moisture content to reduce any risks. However, the more moisture they leave in the coal, the less economical upgrading becomes.
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