Where a settlement agreement requires a party to provide separate certifications addressing distinct matters, compliance with one certification requirement does not constitute compliance with another, even where the matters are related. A letter that addresses only physical commencement of work does not certify the currency of a development consent, as physical commencement is a necessary but not sufficient condition for the consent remaining in force. The concept of 'certification' requires an express assurance, not merely an implication from a letter dealing with a separate topic.
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