IJF SOR 18.104.22.168. Breaking the grips with one or two hands and immediately taking grips is allowed. Breaking grips with one or two hands and not taking a grip immediately is shido. Breaking the grip, if after that a grip is still there, is allowed. For example, if the judoka in blue judogi has one grip and the judoka in white judogi decides to break with one or two hands, white should keep at least one grip in their hand. So, if blue has one grip, after breaking, white shall keep at least one grip. If after breaking the grip, white does not have any grip anymore, it is shido.