What are the regulations for advertising/sponsorship and broadcasting rights for the olympic games?

I'm having to present a 30 minute presentation and I really have no clue of the subject matter. My task is this.
"Analyse critically the advertising/sponsorship regulations and broadcasting rights for the Olympic games. Use examples from several olympics."

Really, I'm trying to find out where the regulations would be written for these different subjects. Also, any ideas on specific examples that we could link into our presentation from past Olympics would be excellent. Scandals etc.

Really, anything at all.
Thanks a lot.

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