Q. You're on a hole that has two bunkers similar to Poplar's hole #1. Your approach shot ends up in the front left bunker. You attempt your bunker shot only to skull it over the green and into the back bunker. Can you rake the first bunker after the first shot?
Rule 13-4 says: Except as provided in the Rules, before making a stroke at a ball that is in a hazard … the player must not:
a. Test the condition of the hazard or any similar hazard;…
Note the key phrase – similar hazard.
Unless a tournament rule allows it, you cannot rake the first bunker until your ball is out of the second bunker because they are similar hazards. It can be deemed that you are "testing the surface".
This happened to Stewart Cink in a tournament where his ball was outside a bunker but he had to put one foot in the bunker to make the shot. His shot went into another bunker. The first bunker was raked although it's unclear if Cink or his caddie raked the bunker. The next day someone told Cink neither he or his caddie could rake the first bunker. Cink told the rules officials and he was DQ'd for not assessing a 2-stroke penalty before turning in his scorecard.