This excerpt taken from the ATVI 10-K filed Jun 14, 2007.
6.2 Rating Requirements. No Licensed Product may be published, sold, distributed, marketed, advertised or promoted unless each Licensed Product bears a consumer advisory age rating, consisting of a rating code and product descriptors, either as required by local law or as issued by, and following the rating display requirements of, a consumer advisory ratings system designated by the SCE Company. Any and all costs and expenses incurred in connection with obtaining such rating shall be borne solely by Publisher. No Licensed Product, Printed Materials or Advertising Materials may bear more than one consumer advisory rating code. Any Online Product that can be used with a Disc Product must bear a rating that is the same as or lower than the rating issued to the Disc Product, unless the SCE Company gives express written consent.