when you collect the key, the will be a join inspection between yourself (owner or owner's rep) and developer' rep.

both will inspect the unit together, with a checklist.
you check & highlight which defect area/part and he will put the sticker on it...
after than you will have a copy of the defect checklist... and from here, take few months to rectify as now new condo all > 1k units...
developer will get their main con to do repair. during the time, you are no allow to do renovation...
DLP is i think 24 months from collect key. in between, you can still submit the defect claim, but if you have done renovation, developer may refuse on the claim if they think the renovation caused the defect....

i am just a normal owner..