DVD Logo Question

On most DVD cases, there’s a DVD logo which shows a disc at an angle, with the words DVD above it (it’s quite small). What are the rules in regard to using this logo? I presume only licensed companies can use it? Any clarification would be very helpful.

The DVD Logo

The main site for the link above is here, the DVD Format/Logo Licensing Corporation.

And for more information on DVD formats, check out the DVD Forum.