Non-Exercise of Rights. 8.1. The Parties, in the best form of law, agree that, except if expressly provided in this Agreement: 8.1.1. The non-exercise, granting of term, forbearance, or delay in the exercise of any right to which it is entitled by this Agreement and/or at law, shall not be a novation nor waiver of such rights, nor it shall prevent the possible exercise thereof; 8.1.2. The single or partial exercise of such rights shall not prevent the subsequent exercise of the remainder of such rights, or the exercise of any other right; 8.1.3. The waiver of any such rights shall not be valid, unless it is granted in writing; and 8.1.4. The waiver of a right shall be restrictively interpreted, and shall not be regarded as waiver of any other right granted by this Agreement.
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Samples: Debenture Subscription Agreement (Portugal Telecom SGPS Sa), Debenture Subscription Agreement (Portugal Telecom SGPS Sa), Debenture Subscription Agreement (Portugal Telecom SGPS Sa)