History of CR 506.4b

Every distinct wording since 2010, newest first.

May 3, 2019 · War of the Spark
Tapping or untapping a creature that’s already been declared as an attacker or blocker doesn’t remove it from combat and doesn’t prevent its combat damage.
January 25, 2019 · Ravnica Allegiance
Tapping or untapping a creature that's already been declared as an attacker or blocker doesn't remove it from combat and doesn't prevent its combat damage.
February 1, 2014 · Born of the Gods
Tapping or untapping a creature that’s already been declared as an attacker or blocker doesn’t remove it from combat and doesn’t prevent its combat damage.
September 30, 2011 · Innistrad
Tapping or untapping a creature that's already been declared as an attacker or blocker doesn't remove it from combat and doesn't prevent its combat damage.
June 17, 2011 · Commander 2011
Tapping or untapping a creature that’s already been declared as an attacker or blocker
April 1, 2011 · Duel Decks: Knights vs. Dragons
Tapping or untapping a creature that's already been declared as an attacker or blocker doesn't remove it from combat and doesn't prevent its combat damage.
February 4, 2011 · Mirrodin Besieged
Tapping or untapping a creature that’s already been declared as an attacker or blocker doesn’t remove it from combat and doesn’t prevent its combat damage.
October 1, 2010 · Scars of Mirrodin
Tapping or untapping a creature that’s already been declared as an attacker or blocker
February 1, 2010 · Worldwake
Tapping or untapping a creature that's already been declared as an attacker or blocker doesn't remove it from combat and doesn't prevent its combat damage.