424.1. During a match, the start of match procedure, and other relevant times during a competition, players must keep cards above the vertical level of the playing surface.
424.2. Players are responsible for making reasonable effort to prevent secret information from being revealed accidentally. See CR 127 Privacy for information types.
424.3. Players may reveal private information unless specifically prohibited by the Core Rules.
424.4. At high OPL, players don’t need to inform opponents of accidentally revealed private information.