History of CR 312.6

Every distinct wording since 2010, newest first.

April 14, 2023 · March of the Machine
A face-up phenomenon card that’s turned face down becomes a new object.
October 7, 2022 · Unfinity
Each vanguard card has a hand modifier printed in its lower left corner. This is a number preceded by a plus sign, a number preceded by a minus sign, or a zero. This modifier is applied to the starting hand size and maximum hand size of the vanguard card’s owner (normally seven). The resulting number is both how many cards that player draws at the beginning of the game and their maximum hand size. See rule 103.5.
July 23, 2021 · Adventures in the Forgotten Realms
Each vanguard card has a hand modifier printed in its lower left corner. This is a number preceded by a plus sign, a number preceded by a minus sign, or a zero. This modifier is applied to the starting hand size and maximum hand size of the vanguard card’s owner (normally seven). The resulting number is both how many cards that player draws at the beginning of the game and their maximum hand size.
May 3, 2019 · War of the Spark
If a non-ongoing scheme card is face up in the command zone, and no triggered abilities of any scheme are on the stack or waiting to be put on the stack, that scheme card is turned face down and put on the bottom of its owner’s scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
January 25, 2019 · Ravnica Allegiance
If a non-ongoing scheme card is face up in the command zone, and no triggered abilities of any scheme are on the stack or waiting to be put on the stack, that scheme card is turned face down and put on the bottom of its owner's scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
June 5, 2017 · Commander Anthology
If a non-ongoing scheme card is face up in the command zone, and no triggered abilities of any scheme are on the stack or waiting to be put on the stack, that scheme card is turned face down and put on the bottom of its owner’s scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
February 1, 2014 · Born of the Gods
If a non-ongoing scheme card is face up in the command zone, and it isn’t the source of a triggered ability that has triggered but not yet left the stack, that scheme card is turned face down and put on the bottom of its owner’s scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
July 1, 2012 · Magic 2013
If a non-ongoing scheme card is face up in the command zone, and it isn't the source of a triggered ability that has triggered but not yet left the stack, that scheme card is turned face down and put on the bottom of its owner's scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
February 1, 2010 · Worldwake
rule 312.6 not present in this release