issue with Guideline 4.2

I believe that the Guideline 4.2 Level 1 Success Criteria should be reworded, since it's current reading seems to hold some technologies to higher standards than others. 

Rather than saying 

  "At least one plug-in required to access the content conforms to at least the default set of conformance requirements of UAAG...", 

I believe this success criteria should say 

  "At least one user agent supporting the content conforms to at least the default set of conformance requirements of UAAG..."

that is, I don't think it should matter whether the support comes in the form of a stand-alone user agent or as a plug-in to a user agent that supports other forms of content as well.