Only after minimum 5 overs play by both sides, DRS will come to the picture.Only one person or 4 persons like rain intervain they are umpire third umpire and match referee coz when rain happen during match time they are centre of everyone's focus all limelight on them for get clue about DLS par score , details about over, match start time etc
But without that, points shall be shared. SA can't afford another point sharing.
Anyone, mire matches should have been alloted to Perth.