Salam!
I would like to know, is it's necessary for a Marja to have a Tauzeeh ul Masail?
Also, someone told me that Ayatullah Khamenei does not have his own Tauzeeh, hence he cannot be a Marja.
These are not my words, It's just something I've heard. I would like to know if this piece of information is credible enough to be held true.