Article 7 Validity of noise certificate
Subject to paragraph (2), any noise certificate issued by the Governor under article 6(1) remains valid indefinitely.
A noise certificate immediately ceases to be valid where—
the certificate is suspended under article 12(1) or (2);
the certificate is revoked under article 12(2);
the aircraft, or any part of it, is modified in a way that affects its ability to comply with the applicable noise standards;
there is a breach of any condition imposed under article 6.
Where a noise certificate has ceased to be valid under paragraph (2)(a), it becomes valid again at such time as the Governor lifts the suspension under article 12(6).
Where a noise certificate ceases to be valid under paragraph (2)(c), the operator must apply for a new certificate in accordance with article 6.
Where a noise certificate has ceased to be valid under paragraph (2)(d), it becomes valid again as soon as the relevant condition is again complied with.
Subject to paragraph (2), where a noise certificate becomes valid again as mentioned in paragraph (3) or (5), that certificate remains valid indefinitely.