(Reading the briefing note on this, Shaw had originally proposed looking at iron and steelmaking, which means sticking it to BlueScope. For some reason, he changed his mind and decided to look at "protein meal" producers (freezing works), before going for lime instead. Sadly, no reason is given for the change).
There's also a briefing on the review itself, which suggests there will be a full review of industrial allocation (good), starting with a review of the Electricity Allocation Factor, which massively overestimated the amount of carbon in our electricity. Unfortunately, there's no indication of when this will start.
Meanwhile, two of the major polluters highlighted in the original news report - Refining NZ and BlueScope Steel - look like they're going to be shutting down or moving to ticket-clipping import operations, which is good news from an emissions POV. And insofar as it causes emissions leakage - unlikely in the case of BlueScope as their facility is one of the dirtiest steelmakers in the world - we can always load the extra carbon cost onto their imports and make them pay that way. In fact, I'm surprised we don't do that already for imported refined petroleum, in order to ensure a level playing-field.