Ann: Trading Halt, page-53

Clearly there is some excitement about this but let's consider all options here:

1 - MPEPR (mining) approved in conjunction with the ML for Siviour Graphite Project as stated in the announcement
2 - MPEPR denied. This seems less likely, as the information exchange process is there for exactly this reason. To cover all bases.
3 - EPEPR (exploration) for the Siviour site. Renascor will not be mining all of Siviour, initially at least. So they have an EPEPR active in regards to the exploration side of it. The face that the announcement states it's for the Siviour Graphite Project to me hints at it being the MPEPR. But this is still a possibility

I can't think of any other scenarios. A TH is in place possibly to slow the trading on open, but more likely to give the DEM time to align their ducks. If you look at the PEPR Approvals page below, the most recent approval was updated there yesterday but the approval was actually awarded on the 23rd, a day prior.
https://www.energymining.sa.gov.au/industry/minerals-and-mining/mining/operational-information/approved-programs