5  Authority Default in Payment

If the Authority:

(a)  fails to make a payment to the Service Provider in accordance with paragraph 4; or

(b)  breaches clause 48.3 (Assignment by the Authority),

the Service Provider may issue a notice to the Authority declaring any unpaid and outstanding element of (as applicable) the Adjusted Estimated Fair Value of the Contract or the Base Senior Debt Termination Amount or the Revised Senior Debt Termination Amount (as relevant) element of the Termination Sum together with any accrued but unpaid interest to be immediately due and payable.