By a letter dated 5.8.2024 (i.e. the day before it issued the Disputed Letter to the Plaintiff), the Defendant had submitted a proposal to DBKL to change the piling system for the Project from micro pile to piling injection ("Piling System Proposal"), contending that that alternative piling injection system would save costs and time. In its letter dated 26.9.2024 to the Project Engineer / S.O. appointed by DBKL, the Defendant pointed out, inter alia, that its proposed piling system involved a combination of jack-in-pile and micro-piling. However, despite submitting a detailed proposal on that change, DBKL rejected that Piling System Proposal in October 2024. Thus, at the time this action was filed, the piling system under the LOA remained.