49.1  Termination Sum

The Authority shall pay to the Contractor the Termination Sum, together with interest on any Base Senior Debt Termination Amount or Revised Senior Debt Termination Amount element of the Termination Sum at the Senior Debt Rate on or before the date falling forty (40) Business Days after the Notice Date provided that it may elect to pay 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 in accordance with clause 49.2 (Instalments) below.