I keep seeing references to "commingled recycling facilities must be able to provide project-specific diversion rates or an average diversion rate for the facility that is regulated by the local or state authority."

I'm trying to find where that lives officially. I don't see it in the April 5th 2016 "current version" LEED V4 BD&C MR: Const & Demo Waste Mgmt credit description. I looked through the addenda. I am only now getting up to speed on V4, so maybe it's obvious to everyone else... Thank you for any help. I'm also particularly in any info/experience on whether this is being "enforced", if any AHJ's are doing good enforcement of this, etc.