History of CR 601.3b

Every distinct wording since 2010, newest first.

May 3, 2019 · War of the Spark
If an effect allows a player to cast a spell with certain qualities as though it had flash, that player may consider any choices to be made during that spell’s proposal that may cause that spell’s qualities to change. If any such choices could cause that effect to apply, that player may begin to cast that spell as though it had flash.
January 25, 2019 · Ravnica Allegiance
If an effect allows a player to cast a spell with certain qualities as though it had flash, that player may consider any choices to be made during that spell's proposal that may cause that spell's qualities to change. If any such choices could cause that effect to apply, that player may begin to cast that spell as though it had flash.
June 8, 2018 · Battlebond
If an effect allows a player to cast a spell with certain qualities as though it had flash, that player may consider any choices to be made during that spell’s proposal that may cause that spell’s qualities to change. If any such choices could cause that effect to apply, that player may begin to cast that spell as though it had flash.
April 27, 2018 · Dominaria
If an effect allows a player to cast a spell with certain characteristics as though it had flash, that player may consider any choices to be made during that spell’s proposal that may cause it to have those characteristics. If any such choices could cause it to match these characteristics, that player may begin to cast that spell as though it had flash.
July 22, 2016 · Eldritch Moon
If an effect allows a player to cast a spell with certain characteristics as though it had flash, that player may consider any choices to be made during that spell’s proposal that may cause it to have those characteristics. If any such choices could cause it to match these characteristics, that player may begin to cast that spell.
February 1, 2014 · Born of the Gods
If the spell instructs its controller and another player to do something at the same time as the spell is being cast, the spell’s controller goes first, then the other player. This is an exception to rule 101.4.
September 30, 2011 · Innistrad
If the spell instructs its controller and another player to do something at the same time as the spell is being cast, the spell's controller goes first, then the other player. This is an exception to rule 101.4.
June 17, 2011 · Commander 2011
If the spell instructs its controller and another player to do something at the same time as the
April 1, 2011 · Duel Decks: Knights vs. Dragons
If the spell instructs its controller and another player to do something at the same time as the spell is being cast, the spell's controller goes first, then the other player. This is an exception to rule 101.4.
February 4, 2011 · Mirrodin Besieged
If the spell instructs its controller and another player to do something at the same time as the spell is being cast, the spell’s controller goes first, then the other player. This is an exception to rule 101.4.
October 1, 2010 · Scars of Mirrodin
If the spell instructs its controller and another player to do something at the same time as the
February 1, 2010 · Worldwake
If the spell instructs its controller and another player to do something at the same time as the spell is being cast, the spell's controller goes first, then the other player. This is an exception to rule 101.4.