Is there a way to change the Слоган of a club if it's abandoned?

Well, me and another user were wondering if Ты could или not. If Ты can could Ты tell me the steps on how to do so?
It's for the Total Drama Island club, the Слоган just says "A fansite for Total Drama Island", not very creative.
Oh and if Ты could tell me how many characters are permited in the motto? So when/if I hold a contest people won't go overboad, that'd be great, thank you! :)