I have reviewed this document as part of the Operational Directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written to improve the operational aspects of the IETF drafts. Document editors and WG chairs should treat these comments just like any other last-call comments. All of them can be considered as Minor.

General:
- For requirement LPD-2 it is mentioned that in case of insufficient prefixes are available the IPv6 CE Router SHOULD log a system management error. Such a log can help greatly to the operational understanding of what is happening in that situation where the host or router is not getting the necessary prefixes. Being benefitial for troubleshooting, I would recommend to elevate it from SHOULD to MUST or REQUIRED. In addition to that, I think it would be possitive to provide an example of the kind of log to be registered, so that there could be a common basis for handling this situations in multivendor / multisystem scenarios adhering to this document.
- LPD-5 refers to delegated prefix expiration. However considerations for expiration are not described or pointed out in teh document. For instance, LPD-3 states that a prefix assigned to a link MUST NOT change in the absence of a local policy or a topology change. I think it would be benefitial for the reader having a sentence where explaining the conditions for expiration.
- LDP-2 and LDP-8 point out specific sections of the referred RFCs, while this is not the case in LDP-1. I would suggest to add the reference to the particular section of RFC8415 referred in LPD-1, as well.
- the following Informational/BCP RFCs are listed as normative reference in the document: RFC6092, RFC6177, RFC7084, RFC8174. Them should be considered as informative references, in my understanding.  

Editorial:
- Introduction: s/"Note that efforts such as Stub Networking Auto Configuration (SNAC) Working Group that depends on IPv6 prefixes being properly distributed in the LAN."/"Note that efforts such as Stub Networking Auto Configuration (SNAC) Working Group depend on IPv6 prefixes being properly distributed in the LAN."
- LDP-6: s/"IPv6 CE routers MUST continue to drop packets destination address that is not assigned to the LAN or delegated."/"IPv6 CE routers MUST continue to drop packets including a destination address that is not assigned or delegated to the LAN."
- LDP-7: s/"...unless configured to use a different prefix-length or the CE Router administrator."/"...unless configured to use a different prefix-length by the CE Router administrator." 
- LDP-7: s/"... a prefix-length shorter then 64 may be configured."/"... a prefix-length shorter than 64 may be configured."

Best regards,

Luis