The mantle of leadership can not be passed, if the clan leader leaves then the clan falls apart. If you want to transfer leadership you'll need to find someone willing to start the clan from scratch again, and of course all the members will have to join that new clan willingly.
3. The clan leader will be able to transfer ownership of the clan.
The clan leader must apply for a transfer at the NPC which handles clan business.
After a waiting period, the leader is changed.
(This will happen even if the server is down.)
During the waiting period, it is possible to cancel the transfer.