In the policy I wrote I basically establish it through the use of a very simple set of questions in an audit format that have zero bias or political leaning.
“What was the source of this story?” “Was it disclosed to the public?” “What’s the impact politically and societally from this story coming out? Who does it benefit?”
And then issuing fines based on the advertisers featured that day of programming.
The audit process is designed to be unbiased because all it does is ask for sources. If they can’t be provided or verified then that’s a violation.
The auditors should have a very wide range of beliefs and must work together to ensure the audits are fair and balanced. The auditors need to be public employees and answer to an oversight committee that will hold them accountable for any shift or variation from the balanced standard.