It is a given that contract administrators may issue omissions for contracted works. Of course, any such omission issued must be made bona fide, and not issued for purpose of appointing a third party contractor who may turn out to be cheaper.
When omissions are issued, that means the contractor has a reduced scope of work. What implication does that have for the contract period?
Generally, the law provides that a contract administrator cannot reduce the contract period even if he has drastically reduced the scope of works. In other words, omissions cannot be a back-door acceleration programme because a contractor cannot be compelled to complete the contract earlier than stipulated (Glenlion Construction Ltd v The Guinness Trust).
This position seems reasonable bearing in mind that the contract may have committed to other works elsewhere and hence would not be in a position to mobilise his workers even if his scope of works have been reduced.
However, that does not mean that omissions have no impact whatsoever on extensions of time. A contract administrator can take into consideration previous omissions of work when the contract applies for extension of time to complete. The caveat is that any new completion period must not be earlier than the contracted one.
Kheng Hoe Advocates
Building contract and construction contract dispute lawyers
PS: If you have any building contract and construction contract related issues, I invite you to take advantage of my free one-to-one consultation to explore your next steps. There is totally no obligation on your part, and regardless whether you engage me or not, I guarantee that you will walk away with a clear idea as to where your case stands and how to take your case forward. To schedule an appointment, e-mail me with a brief description of your issue at firstname.lastname@example.org.