https://darioamodei.com/post/we-must-pace-the-frontier
I'm not seeing how that solves his 3rd-party competition problem.
Just have it in public instead of making deals in smoke filled datacenters. Put out your blog posts. Make your tweets. Do interviews and post them to youtube. Or do what other industries do and have a public standards committee. Problem solved.
All sorts of industry have safety conversations and set voluntary standards all the time. Just go do that, without your free immunity from government prosecution.