This excerpt taken from the CCO DEF 14A filed Apr 30, 2009.
Stockholders and other interested parties may contact an individual director, the Presiding Director, the Board as a group, or a specified Board committee or group, including the non-management directors as a group, by sending regular mail to the following address:
Board of Directors
Clear Channel Outdoor Holdings
P.O. Box 659512
San Antonio, Texas 75265-9512
Each communication should specify the applicable addressee or addressees to be contacted, as well as the general topic of the communication. We will initially receive and process communications before forwarding them to the addressee. We may also refer communications to other departments at the Company. We generally will not forward to the directors a communication that is primarily commercial in nature, relates to an improper or irrelevant topic, or requests general information regarding the Company.