History of CR 609.4a

Every distinct wording since 2010, newest first.

May 3, 2019 · War of the Spark
If two effects state that a player may (or a creature can) do the same thing “as though” different conditions were true, both conditions could apply. If one “as though” effect satisfies the requirements for another “as though” effect, then both effects will apply.
January 25, 2019 · Ravnica Allegiance
If two effects state that a player may (or a creature can) do the same thing "as though" different conditions were true, both conditions could apply. If one "as though" effect satisfies the requirements for another "as though" effect, then both effects will apply.
May 1, 2014 · Journey into Nyx
If two effects state that a player may (or a creature can) do the same thing “as though” different conditions were true, both conditions could apply. If one “as though” effect satisfies the requirements for another “as though” effect, then both effects will apply.
September 30, 2011 · Innistrad
If two effects state that a player may (or a creature can) do the same thing "as though" different conditions were true, both conditions could apply. If one "as though" effect satisfies the requirements for another "as though" effect, then both effects will apply.
June 17, 2011 · Commander 2011
If two effects state that a player may (or a creature can) do the same thing “as though”
April 1, 2011 · Duel Decks: Knights vs. Dragons
If two effects state that a player may (or a creature can) do the same thing "as though" different conditions were true, both conditions could apply. If one "as though" effect satisfies the requirements for another "as though" effect, then both effects will apply.
February 4, 2011 · Mirrodin Besieged
If two effects state that a player may (or a creature can) do the same thing “as though” different conditions were true, both conditions could apply. If one “as though” effect satisfies the requirements for another “as though” effect, then both effects will apply.
October 1, 2010 · Scars of Mirrodin
If two effects state that a player may (or a creature can) do the same thing “as though”
February 1, 2010 · Worldwake
If two effects state that a player may (or a creature can) do the same thing "as though" different conditions were true, both conditions could apply. If one "as though" effect satisfies the requirements for another "as though" effect, then both effects will apply.