This excerpt taken from the ATVI 8-K filed Oct 23, 2006.
SECTION 15. NOTICE OF DISPOSITION.
Each Participant shall notify the Company in writing if the Participant disposes of any of the shares purchased in any Offering Period pursuant to this Plan if such disposition (a Disqualifying Disposition) occurs within the later of (i) two (2) years from the Offering Date, or (iii) twelve (12) months from the Purchase Date on which such shares were purchased (the Notice Period). The Company may, at any time during the Notice Period, place a legend or legends on any certificate representing shares acquired pursuant to the Plan requesting the Companys transfer agent to notify the Company of any transfer of the shares. The obligation of the Participant to provide such notice shall continue notwithstanding the placement of any such legend on certificates.