Historical Rules · 27 September 2013
Rule 904.10
Official source text from the 27 September 2013 Rules release
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.)