The National Cybersecurity Center of Excellence (NCCoE) has released a draft Cybersecurity Practice Guide for public comment: Draft NIST Special Publication (SP) 1800-16, Securing Web Transactions: Transport Layer Security (TLS) Server Certificate Management
See https://csrc.nist.gov/publications/detail/sp/1800-16/draft
I have not read it all yet, but I believe you may want to point them to the ACME protocol and perhaps join the public-private partnership.
Thank you for providing an excellent service!
=Fen