This excerpt taken from the ATVI 10-Q filed Feb 8, 2006.
Concept. For each Software Title, Publisher shall deliver to Microsoft a completed Conceptsubmission form (in the form provided by Microsoft to Publisher) that describes the Software Title. In the event that Publisher desires to host or have a third party host or provide to Xbox Live Users any of Publishers Online Game Features,Publisher shall so indicate on the Concept submission form and must execute an addendum to this Agreement, which addendum is available upon request and will be incorporated into this Agreement upon execution. Following evaluation of Publishers Concept submission, Microsoft will notify Publisher of whether the Concept is approved or rejected. If approved, the Concept submission form, in the form submitted and approved by Microsoft, is incorporated herein by reference and adherence to its terms is a requirement for Certification. Publisher may propose Online Content at any time after a Concept has been approved, in which case Publisher shall deliver to Microsoft a separate Concept submission for each proposed piece of Online Content.