[Commentor] LC-331 Ian Jacobs [Comment] * This also comes from WCAG, but I no longer see it in WCAG 2.0. Have you asked them why it was deleted? (I don't see it in the23 Nov 2005 draft) [Commentor reply] yes [Working Group decision] 
It may have been a WCAG point but the mobile interpretation is that some devices don't do style sheets.