[Commentor] LC-360 Charles McCathieNevile on behalf of Opera Software [Working Group decision] We have clarified the default delivery context, and now it only allows external style sheet as required by XHTML Basic. [Commentor reply] no reply from commenter [Comment] 
5. Style sheets XHTML Basic does not include any support for internal styles. It makes sense, given the problems of latency that are a key constraint in the mobile space, to mandate support for internal styling, but it is not clear from the current wording what support can be expected (and therefore, as an implementor, what support we are implicitly being required to provide).