An article titled "Viewpoint Diversity" Requirements as a New Fairness Doctrine is forthcoming in the George Mason Law Review. A draft of the article is available, and feedback is welcome.
The article draws an analogy between the Fairness Doctrine and viewpoint diversity requirements, highlighting potential problems with the latter.
One of the problems with the Fairness Doctrine is likely to also arise with viewpoint diversity requirements.
A PDF version of the draft is available, including footnotes. The opening sections of the article explore the Fairness Doctrine / viewpoint diversity requirements analogy.
Author's summary: Exploring viewpoint diversity requirements as a new fairness doctrine.