History of CR 710.4

Every distinct wording since 2010, newest first.

July 23, 2021 · Adventures in the Forgotten Realms
Flipping a permanent is a one-way process. Once a permanent is flipped, it’s impossible for it to become unflipped. However, if a flipped permanent leaves the battlefield, it retains no memory of its status. See rule 110.5.
April 22, 2021 · Strixhaven
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.87) at all times; it may be activated regardless of how many level counters are on that permanent.
May 3, 2019 · War of the Spark
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.86) at all times; it may be activated regardless of how many level counters are on that permanent.
January 25, 2019 · Ravnica Allegiance
Any ability a leveler card has that isn't preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.86) at all times; it may be activated regardless of how many level counters are on that permanent.
February 1, 2014 · Born of the Gods
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.86) at all times; it may be activated regardless of how many level counters are on that permanent.
July 13, 2013 · Magic 2014
Any ability a leveler card has that isn't preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.86) at all times; it may be activated regardless of how many level counters are on that permanent.
September 30, 2011 · Innistrad
Any ability a leveler card has that isn't preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.85) at all times; it may be activated regardless of how many level counters are on that permanent.
June 17, 2011 · Commander 2011
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In
April 1, 2011 · Duel Decks: Knights vs. Dragons
Any ability a leveler card has that isn't preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.84) at all times; it may be activated regardless of how many level counters are on that permanent.
February 4, 2011 · Mirrodin Besieged
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.84) at all times; it may be activated regardless of how many level counters are on that permanent.
October 1, 2010 · Scars of Mirrodin
Any ability a leveler card has that isn’t preceded by a level symbol is treated normally. In
April 23, 2010 · Rise of the Eldrazi
Any ability a leveler card has that isn't preceded by a level symbol is treated normally. In particular, each leveler permanent has its level up ability (see rule 702.84) at all times; it may be activated regardless of how many level counters are on that permanent.
February 1, 2010 · Worldwake
The controller of another player's turn makes all choices and decisions that player is allowed to make or is told to make during that turn by the rules or by any objects. This includes choices and decisions about what to play, and choices and decisions called for by spells and abilities.