From the Apple press release:
Cook will continue in his role as CEO through the summer as he works closely with Ternus on a smooth transition. As executive chairman, Cook will assist with certain aspects of the company, including engaging with policymakers around the world.
I guess Tim isn’t ready to give up handling the bribes just yet.

This is very funny, because the kind of people who want Trump's face smeared all over their official documents are probably not the kind of people who do a lot of international travel.