Exhibit 3.19

CERTIFICATE OF FORMATION

OF

AKC HOLDING LLC

1. The name of the limited liability company is AKC Holding LLC.

2. The address of its registered agent in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle 19801, The name of its registered agent at such address is The Corporation Trust Company.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation of AKC Holding LLC this 12^th day of April 2005.

/s/ Christopher T. Ford

Christopher T. Ford

Authorized Signatory

State of Delaware

Secretary of State

Division of Corporations

Delivered 05:43 PM 04/12/2005

FILED 05:10 PM 04/12/2005

SRV 050296138 – 3953963 FILE