15.1 Proofs of all work may be submitted for Client’s approval and Company shall incur no liability for any errors not corrected by the Client in proofs so submitted. Additional charges shall be made for any additional proofs that are required as a result of alterations required by the Client. When style, type or layout is left to Company’s discretion, any subsequent changes to such style, type or layout required by the Client shall be subject to additional charges on a time and materials basis.