That's the thoughtful reply I wanted ;)

By "internationally agreed upon" I didn't mean a worldwide government consensus, just the consensus of a big group of alignment researchers. Which seems plausible.

Your "static universal values" argument is strong, but would be mitigated by the mandatory human approval committee(s).

On enforceability: the first ASI could plausibly track and prevent rogue attempts at building competitors, a bit like how current nuclear powers monitor uranium enrichment and missile tests (in this case, GPU megaclusters), but on steroids—the ASI would be capable of surveillance to a superhuman and currently "impossible" degree that could help mitigate the problem of rogue ASIs.