Codelfa contracted with the State Rail Authority to excavate tunnels to do the concrete work on the construction of Sydney's Eastern Suburbs Railway. Various stages of the work were to be completed by certain dates, and the whole contract was to be completed within 130 weeks. Due to building noise, local residents applied for and were granted Injunctions to restrain work during the night, and as a result, Codelfa could not complete the contract on time. Required:

1. Can a Term be implied into a contract to require the State Rail Authority to give an extension of time?

2. Discuss the legal condition of the Performance of the contract