Cargo Heat - Can not can.
My post was clearly prefixed 'off topic' so don't read it.
BFP - as WingoWango says, the rules are exactly the same here in Europe. If you shoot an approach after being told at the OM/4D/1000' that the RVR is now below your limits, then it is deemed an 'illegal' approach and the ATC authority is obliged to report it.