HSTS preloading

Server
4

I think this is a separate issue. To summarize:

  • Only registered domains (i.e. effective TLS plus one label) may be added to the preload list.
  • If such a domain sends the preload parameter, it can be added to the preload list by any person, regardless of PSL status.

But maybe what you are saying is that for subdomains of registered domains (www.example.com), they cannot be added to the preload list even if they send the preload parameter?