[Translation] Ref. PDI.B.02.142/98 23 November, 1998 To : President The Stock Exchange of Thailand Re. : Notification of resignation of two directors This is to notify the SET that Dr. Olarn Chaipravat has tendered his resignation from PDI directorship and Mr. Aswin Kongsiri has resigned from the company's directorship and membership of the executive committee effective from 19 November 1998. Yours truly, - Signature - (Mr. Brett T. Lambert) President & CEO Board Secretary Division Human Resources and Corporate Administration Department