See, your point is exactly why the way you are thinking about this doesn't work. You're almost there, just coming at it from the wrong direction.

Yes, basic language choices indeed create an emotional framing to a story.

Basic language choices create a framing to a story EVERY TIME. You can't avoid it. Any mediocre professional can alter the framing of a story under any style guide, with any requirements for information sourcing.

Editorial guidance for neutrality can be enforced. By an editor. A human person that reviews a piece of writing and assesses its skew and its style to correct it if it doesn't fit the requirements.

But as a rule? Using citations? If the average journalist wanted to present a specific framing the guidelines you are suggesting would barely slow them down.

"A young man stole a car" "Man, 28 (link), steals car" "Man, 28 (link), of latino descent (link) commits crime in our town (link)"

Which of these is complying with your guidelines closest and which one is creating a more biased narrative?