I am the assigned OPS-DIR reviewer for this draft. Apologies for a late review.

Summary: The document is ready with nits.

I found the document solid and ready. One minor comment below:

In section 4.1:
      options.  For example, if only option Kinds <= 32 are observed,
      then the value of the udpSafeOptions IE can be encoded as
      unsigned32, or if only option Kinds <= 63 are observed, then the

Shouldn't it say:
      options.  For example, if only option Kinds <= 31 are observed,