These excerpts taken from the BP F-3ASR filed Dec 1, 2008.
Section 9.8 Other Plans
The Company and the Administrator may establish procedures to integrate participants in other similar plans into the Plan if the securities in such other similar plans are Ordinary Shares and/or ADS Shares and if otherwise appropriate.
Effective Date of Third Amendment and Restatement of the Plan: November 3, 2008.
Effective Date of the Plan: May 1, 2001.