The results of a conforming test suite in this case should not be used to determine the conformance of an implementation of the base standard. If yyy requires aaa then xxx requires bbb, whereas if yyy requires ccc then xxx requires ddd. A request for interpretation of the yyy standard is being forwarded to the yyy committee. In this case an attempt should be made to notify the previous requester. The Requester is asked to submit a rephrased or more specific request.
More information is available on which standards are covered and how to request an interpretation.