This document defines sub-policies that refine the Specification Required registry policy in RFC 8126. About This Document This note is to be removed before publishing as an RFC. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-nottingham-ianabis-spec-reqd/. information can be found at https://mnot.github.io/I-D/. Source for this draft and an issue tracker can be found at https://github.com/mnot/I-D/labels/spec-reqd.