This excerpt taken from the SWY DEF 14A filed Apr 12, 2005.
A stockholder giving a proxy pursuant to the present solicitation may revoke it at any time before it is exercised by giving a subsequent proxy or by delivering to the Secretary of the Company a written notice of revocation prior to the voting of the proxy at the Annual Meeting. If you attend the Annual Meeting and inform the Secretary of the Company in writing that you wish to vote your shares in person, your proxy will not be used. If you receive two or more proxy cards, please vote with respect to each in accordance with the procedures described thereon to complete your representation. All shares represented by each properly completed and unrevoked proxy will be voted unless the proxy is mutilated or otherwise received in such form or at such time as to render it unusable. All shares properly voted in accordance with the procedures set forth in this Proxy Statement and the accompanying proxy card will be voted in accordance with your instructions.