Edison format ruling
D.D. Scout Plane

Card effect (current official text)Once per turn, during the End Phase, if this card is currently banished, and was banished this turn: Special Summon it in face-up Attack Position.
Rulings
- D. D. Scout Plane's effect can only activate once during the same End Phase, so if a combo of Banisher of the Light and King Tiger Wanghu is set up, D. D. Scout Plane will only be Special Summoned once.
- It is the OWNER of D. D. Scout Plane that Special Summons it. Even if your opponent controls your D. D. Scout Plane, if it is removed from play, you get to Special Summon it.
- If you don't have a vacant Monster Card Zone when D. D. Scout Plane would be Special Summoned, D. D. Scout Plane is destroyed and sent to the GY.
- D. D. Scout Plane's effect activates whether it is removed from your hand, Deck, GY, or the field.
- If D. D. Scout Plane is removed from play and is face-down while out of play, such as with Lightforce Sword or Different Dimension Capsule, D. D. Scout Plane's effect does not activate. But if D. D. Scout Plane was face-down on the field, and was removed by Nobleman of Crossout, it is placed face-up while out of play and its effect does activate.
- If D. D. Scout Plane is face-down on the field while Banisher of the Light is in play, and D. D. Scout Plane is destroyed by Raigeki Break, it is removed from play and its effect activates because it is placed face-up out of play.
- If D. D. Scout Plane is destroyed by Dark Ruler Ha Des and then removed from play to Special Summon Chaos Emperor Dragon - Envoy of the End, D. D. Scout Plane's effect activates and it will be Special Summoned.
- If D. D. Scout Plane is destroyed by Lesser Fiend, D. D. Scout Plane's effect activates and it is Special Summoned even if Dark Ruler Ha Des was also in play when it was destroyed.
- If D. D. Scout Plane is removed during an End Phase, it is Special Summoned with its effect during that same End Phase.
- If Prohibition was used and D. D. Scout Plane is prohibited, D. D. Scout Plane cannot be Special Summoned and remains removed from play.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.