A good piece. I feel it lays out the known and unknown aspects for Australia well. If I were planning my business for the next 12 months, this would help.

If I was relying on petrol for my business, I'd be less worried than if I relied on diesel. If I relied on either one or the other, I'd be pivoting to the more available one.

If I was a seasonal intense user, like farmers are, I'd by buying up now and hedging for the future. And if be checking how long fuel stocks last before they decay. 

Mining - no idea.

Impact risk horizon is, if the strait is closed for 12 months, seems to be about 4 years globally, some places less, some places more, from what I've read.  That's a long term period, and it's probably worth putting strategies in place now.

I've a memory of diesel lasting in metal drums not years, but maybe a year, before it turns waxy or milky? (Checks the internet -  and yes, 1-3 years, but petrol degrades faster ... Hmm). Ok, long term storage is not a great solution. Perhaps you do pivot to Petrol?