https://www.ofcom.org.uk/siteassets/resources/documents/onli...
It amounts to your basic terms of service. It means that you'll need to moderate your forums, and prove that you have a policy for moderation. (basically what all decent forums do anyway) The crucial thing is that you need to record that you've done it, and reassessed it. and prove "you understand the 17 priority areas"
Its similar for what a trustee of a small charity is supposed to do each year for its due diligence.
You just have to make individual value judgements every day on thousands of pieces of content for SEVENTEEN highly specific priority areas.
Then keep detailed records on each value judgement such that it can hold up to legal scrutiny from an activist court official.
> Any competent forum operator is already doing all of thisWhat is your evidence that the record keeping described by the parent is routine among competent forum operators?