Elephant hunting and Ivory Selling; Dangerous Game Hunting?

I was pretty sure that selling ivory is globally illegal...but i saw a TV show on elephant hunting...whats the deal? They can hunt it but the ivory can't be sold? That;s what i'm assuming but not sure.
and also...is the whole elephant used? is a all the meat and bones used is anything wasted? I hope not...i mean i love animals but i'm ok with hunting and everything as long as nothing is wasted and i mean an elephant is like a lot of stuff to do things with it could probly feed like a friggin country..maybe not but you know what i mean