AMENDMENT TO THE
BIOGEN IDEC INC.
2003 OMNIBUS EQUITY PLAN
The Biogen Idec Inc. 2003 Omnibus Equity Plan (the "Plan") is hereby amended in accordance with its terms as
1. The first paragraph of Section 4 of the Plan is hereby amended by adding the following sentence to the end of
"The Committee may, in its discretion and to the extent permitted under applicable law and the requirements of
any securities exchange upon which the securities of the Company trade, delegate to an officer or officers of the
Company the ability to make Awards under the Plan, subject to such restrictions and limitations as the Committee
may specify in the resolution authorizing such delegation."
2. Except as set forth in this Amendment, the Plan shall remain in full force and effect.