The complete summary was already posted as 124 Summary 1-11. True wisdom can be found in the stars. We, the players, each have a sign. Study the stars. Well, I'll make you one with 1 style point.
All players have different signs.
I will interpret it as being the seventh Valid rule. I will also allow you the benefit of the doubt by not taking this rule to imply that there actually will be seven Valid rules. Note, this does not mean there must be at least seven different players for the round to continue past that point, since there could be rules before the seventh with the same author. No one has more than one sign. No one's sign can change.