39.2 On the occurrence of an Authority Event of Default, or within a reasonable time after Sub-hubco becomes aware of the same, and while the same is still subsisting, Sub-hubco may, at its option:
39.2.1 in respect of execution of the Works, suspend performance by it of its obligations under this Agreement until such time as the Authority shall have demonstrated to the reasonable satisfaction of Sub-hubco that it is capable of performing, and will perform, its obligations under this Agreement; or
39.2.2 serve notice on the Authority (or such other party as may be notified in advance in writing by the Authority to Sub-hubco) of the occurrence (and specifying details) of such Authority Event of Default. If the relevant matter or circumstance has not been rectified or remedied by the Authority (or otherwise) in respect of Clause 39.1.1 or Clause 39.1.3 within sixty (60) Business Days of such notice, and in respect of Clause 39.1.2 within thirty (30) Business Days of such notice, Sub-hubco may serve a further notice on the Authority (or its substitute notified in accordance with this Clause 39.2.2) terminating this Agreement with immediate effect.
39.3 Sub-hubco shall not exercise or purport to exercise any right to terminate this Agreement (or accept any repudiation of this Agreement) except as expressly set out in this Agreement.