[ubl-ndrsc] How to submit a comment against the CC Tech Spec

The announcement of the CC Tech Spec 
public review says:

  
In order to assist in the review and commenting, the Technical 
  Specification has each line start with a unique line number to allow 
  placements of comments against them. For each comment, reviewers shall provide 
  the specification's line number range, the comment itself, the rational for 
  the comment, and suggestion for change.

We have until May 4.

-Bill