At any time that the Authority is entitled to give a Step-in Notice pursuant to Clause 3.1 (Step-in Notice) or at any time during the Step-in Period the Authority may give notice (copied to the Security Trustee) (a "Proposed Novation Notice") to the Contractor that it wishes itself or another person (a "Proposed Substitute") to assume, by way of sale, transfer or other disposal, the rights and obligations of Sub-hubco under the Construction Contract and specifying a date (the "Proposed Novation Date"):

4.1.1 falling not later than [fifteen (15)] Business Days after termination of the Design Build Finance and Maintain Agreement where this has been terminated by the Authority;

4.1.2 falling not later than the expiry of the Termination Notice where a Proposed Novation Notice is given by the Authority at a time when it is entitled to give a Step-in Notice pursuant to Clause 3.1 (Step-in Notice); and

4.1.3 falling not later than [twenty-eight (28)] Business Days after the date of the Proposed Novation Notice, where a Proposed Novation Notice is given during a Step-in Period.