History of CR 603.7

Every distinct wording since 2010, newest first.

May 3, 2019 · War of the Spark
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain “when,” “whenever,” or “at,” although that word won’t usually begin the ability.
January 25, 2019 · Ravnica Allegiance
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain "when," "whenever," or "at," although that word won't usually begin the ability.
May 1, 2014 · Journey into Nyx
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain “when,” “whenever,” or “at,” although that word won’t usually begin the ability.
February 1, 2014 · Born of the Gods
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain "when," "whenever," or "at," although that word won’t usually begin the ability.
September 30, 2011 · Innistrad
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain "when," "whenever," or "at," although that word won't usually begin the ability.
June 17, 2011 · Commander 2011
An effect may create a delayed triggered ability that can do something at a later time. A delayed
April 1, 2011 · Duel Decks: Knights vs. Dragons
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain "when," "whenever," or "at," although that word won't usually begin the ability.
February 4, 2011 · Mirrodin Besieged
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain “when,” “whenever,” or “at,” although that word won’t usually begin the ability.
October 1, 2010 · Scars of Mirrodin
An effect may create a delayed triggered ability that can do something at a later time. A delayed
February 1, 2010 · Worldwake
An effect may create a delayed triggered ability that can do something at a later time. A delayed triggered ability will contain "when," "whenever," or "at," although that word won't usually begin the ability.