EXHIBIT (C)(6) AMENDMENT NO. 4 TO THE SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (SERP) OF SAVANNAH FOODS & INDUSTRIES, INC. AND SUBSIDIARIES THIS AMENDMENT NO. 4 is made as of the 4th day of September, 1997, by Savannah Foods & Industries, Inc. (the "Company"). W I T N E S S E T H: WHEREAS, the Board of Directors of the Company adopted the Second Amendment and Restatement of the Supplemental Executive Retirement Plan (SERP) of Savannah Foods & Industries, Inc. and Subsidiaries, effective January 1, 1989, together with subsequent amendments thereto (such plan, as amended to date, being hereinafter referred to as the "Plan"); and WHEREAS, pursuant to its authority under Article 11 of the Plan, the Board desires to amend the Plan in certain respects. NOW, THEREFORE, effective as of September 4, 1997, the Plan is hereby amended as set forth below: ITEM ONE Section 1.7 of the Plan is hereby amended by adding the following sentence at the end thereof: Notwithstanding the foregoing, any transaction pursuant to an agreement to which the Company and Imperial Holly Corporation are parties shall not constitute a Change in Control. IN WITNESS WHEREOF, the Company has caused this Amendment to be executed as of the day and year first above written. SAVANNAH FOODS & INDUSTRIES, INC. By: ---------------------------------- President 2