All communications hereunder shall be in writing and, if sent to the Initial Purchasers, shall be mailed or delivered to Deutsche Bank Securities Inc., 60 Wall Street, New York, New York 10005, Attention: Leveraged Debt Capital Markets, Second Floor (fax: (212) 797-4877), with a copy to the attention of the General Counsel, 36th Floor (fax: (212) 797-4561), with a copy to Cahill Gordon & Reindel LLP , 80 Pine Street, New York, New York 10005, Attention: John A. Tripodoro; and if sent to the Company, shall be mailed or delivered to the Company at 4646 East Van Buren, Suite 400, Phoenix, Arizona 85008, Attention: Christopher J. Miner; with a copy to DLA Piper LLP (US), 2525 East Camelback Road, Suite 1000, Phoenix, Arizona, Attention: Gregory R. Hall.