Who elects these people?

I often wonder about the many surprising ways we end up deferring power to certain "community leaders" who don't have any direct responsibility to the citizenry. It's bad enough that we've somehow all agreed that University Presidents can be our arbiters of all things ethicsy. (Really, think about how ridiculous that is for a sec) But why the hell would anyone think it's a good idea to give billionaire leeches like Tom Benson and George Shinn a say in how the city manages its public playgrounds?

The other proposed charter amendment would create a new entity to govern the city's recreation facilities and programs. A new 12-member commission would include appointees from the mayor's office, the council and the city's two major professional sports organizations.

What qualifications do they have to fill this function, exactly?