Coal tonnage limits at the mines ?

Somewhere, embedded in some thread, I was reading about some places putting daily limits on the amount of coal you could buy, but can't find it anywhere.

Can someone provide a link? Thanks.

UAE had a 2-ton limit last year. Not sure if thats still in place.
Edit: Evidently, its still the limit....
June 15th - a date to watch?

Thanks, that was it.