Jeanette Jana BHT Ronald Jana v Western Sydney Local Health District trading as Westmead Hospital  NSWSC 1444 (available on Caselaw) is of interest for the Court’s consideration of what terms should be taken as implied in a later jugment order.
The defendant sought to imply a term which would not require them to pay interest until the last of the three notices to be received from the NDIA, Medicare and Centrelink is received by the defendants. That is, it is sought to imply a term into the agreement which has the effect of varying the provisions of s 101 of the Civil Procedure Act. .
The Court held at  before declining to imply the term at :
Whilst it may be accepted that terms of settlement frequently contain provisions similar to what is contained in paragraph 4, that situation usually results from a negotiation between the parties, generally after the time the settlement figure has been agreed. That seems to me to be some distance from suggesting that such a term can be implied into an agreement. Such a term does not always appear in an agreement of this type.