[WSC Clause] XIII [Opera] Conforms Optional [Chrome] Does Not Conform Optional [Firefox] 
Conforms Optional
C o n f o r m s B a s i c
C o n f o r m s A d v a n c e d
N A
D o e s N o t C o n f o r m O p t i o n a l
C o n f o r m s O p t i o n a l