Only requirements are: th9 and above, having max troops. th10s should be able to 3 star th 9 most of the time and th 11s to th10s.
Low defence villages are welcomed.
All clan members are free to talk, make suggestions about clan rules, oppose the leaders (in a polite way), and everything about the clan. Everyone shares the owning of the clan.
Then who can be kikcked from the clan? Well any inpolite behaviour, long inactivity period, recieving too much while donating nothing may result in a ban from the clan.