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Something more like "golden rule"... like, "this is the golden rule of our company, and you can't expect it to ever be changed."

But I know there's another word for it. Dang it.



Set in stone? I put that into Onelook's Reverse Dictionary, but it gave mostly ref.'s to stones, so I put in 'inviolable'; you might want to see if any of these are what you're looking for:
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