Authorization Response "scope" parameter

Section 3.1 of draft 09 states that an Authorization Response contains an OPTIONAL scope parameter. However, we propose the following change to that parameter’s text:

   scope
         REQUIRED if it has been passed in the authorization request, otherwise OPTIONAL.
         This parameter delimits the scope of the access token as an unordered list of
         space-delimited strings, each adding an additional access range to the requested
         scope.
         The value of the "scope" parameter is defined by the authorization server and
         MUST take into account the "scope" requested in the authorization request by setting the
         authorization response "scope" parameter to the values to which the token grants access.
         Furthermore, the authorization server can add any other values deemed necessary
         to determine response scope.