This excerpt taken from the DTV DEF 14A filed Apr 21, 2008.
Proxies for Shares Held In Employee Savings Plans
If you participate in the following savings plans, your proxy card will serve to instruct the Trustee of each plan how to vote your shares in the plan. If you do not provide instructions on how to vote your shares held in the following plans, these shares may be voted at the discretion of the Trustee:
DIRECTV Thrift and Savings Plan
DIRECTV Savings Plus Plan
For stock held through these plans, whether you vote your stock by telephone, through the U.S. Mail or by Internet, your directions must be received by Computershare no later than 5:00 P.M., Eastern time, on May 28, 2008. Please note that while you may attend the Annual Meeting, you may not vote stock held through these plans at the meeting. Your vote is confidential.