Adding to that, you may have 2 different scenarios:

1) Common Property completed earlier than Vacant Possession Date, a certificate of completion of common property with photographs proof is required.
> this will stop the LAD to common property earlier than the LAD to the unit
> For example, LAD to common property on 31/12/2018 while LAD to unit may fall on 2/2/2019

2) Common Property is completed same as Certificate of Compliance and Completion (CCC).
> without separate certificate of completion of common property, in general we can consider the completion of common property is same date as CCC. Whereby when architect issued CCC, it should mean all the works within the development is completed and fit for occupancy.
> in this case, LAD to common property and LAD to unit is using the same date.

TQ