15. Appendix A. Grandfathered Media Types

   A number of media types, registered prior to 1996, would, if
   registered under the guidelines in this document, be placed into
   either the vendor or personal trees.  Reregistration of those types
   to reflect the appropriate trees is encouraged but not required.
   Ownership and change control principles outlined in this document
   apply to those types as if they had been registered in the trees
   described above.