Exhibit 3.73

State of Delaware
Secretary of State
Division of Corporations
Delivered 08:58 AM 04/01/2004
FILED 08:58 AM 04/01/2004
SRV 040239421 — 3781587 FILE

CERTIFICATE OF FORMATION

OF

NORAMPAC DELAWARE LLC

     This Certificate of Formation of Norampac Delaware LLC (the “LLC”), dated as of March 31, 2004, is being duly executed and filed by the undersigned, as an authorized person, to form a limited liability company under the Delaware Limited Liability Company Act (6 Del.C. § 18-101, et seq.)

     FIRST. The name of the limited liability company is Norampac Delaware LLC.

     SECOND. The address of the registered office of the LLC in the State of Delaware is c/o RL&F Service Corp., One Rodney Square, 10^th Floor, Tenth and King Streets, Wilmington, New Castle County, Delaware 19801.

     THIRD. The name and address of the registered agent for service of process on the LLC in the State of Delaware are RL&F Service Corp., One Rodney Square, 10^th Floor, Tenth and King Streets, Wilmington, New Castle County, Delaware 19801.

     IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of the date first above written.

/s/ Robert Hall
Name:	Robert Hall
Authorized Person