WOTC has recommended but not required, the following play modifications during a game of Magic. We have not decided if we will implement them yet when we return to in store OP
Stores also may, if they so wish, modify the rules of Magic play to minimize player contact with other plyers. Of course, said modifications must comply with local laws. WOTC provided examples of such play modifications as:
Players may only shuffle or cut their own decks
Cards must remain on the owner’s side of the table when control is changed
Cards attached to cards owned by other players should not physically touch
Mechanics that require an opponent to search a player’s library, hand, or graveyard are performed by the owner displaying that zone to the active player without cards changing hands
Essentially, it appears that it that stores may implement any change in the rules of play that would prevent one player from touching another’s cards .