Those aged under 12 or over 65, as well as disabled people who have difficulties in using the app, will be exempted from the requirement.

Back in March, there began to be a requirement where government employees and members of the public must scan the LeaveHomeSafe QR code or register their names, contact numbers and the date and time of their visits before entering government premises.

But starting November, they will no longer be given the choice.

The government stated that the current measure of allowing citizens to fill in their name and phone number only may lead to loss of or untrue personal data, reducing the accuracy and efficiency of close contact tracing.

It said that the new measure can ensure that the Centre for Health Protection conducts efficient investigations of confirmed cases and protect the safety of citizens and government staffers.

Those who are exempted from using the LeaveHomeSafe app will be required to fill in their name, first four digits of their identity card, phone number and date and time of visit on a registration form. They will also need to display identification documents to staffers at the government premise.

The government urged citizens to download and use the LeaveHomeSafe app, adding that it hoped that the new measure can encourage private companies to enforce the usage of the app. It also reminded that citizens who provide false or misleading information may be charged.