Also, if you are going to quote the JLS,
you should say so ... along with providing a note that states to which section you are quoting from.
The JLS is like legalese, to quote it out of context, is the quickest way to confuse people, or to wind up with nonsense.
All the statements are saying is that certain types of forward referencing is not allowed -- and are listed in that section of the JLS.
Henry