Rules glossary
↑ Parent rule: 729.2 As the subgame starts, an entirely new set of game zones is…
729.2a As a subgame begins, if one or more supplementary decks of nontraditional cards are being used, each player moves each of their supplementary decks from the main-game command zone to the subgame command zone and shuffles it. (Face-up nontraditional cards remain in the main-game command zone.)
No sub-rules.