Did you buy those unsold house from developer with very big discount?? It seen like you must report defect on those 5 items within 5 days after collect the key. Here has nothing to say on normal 24 mths DLP to be beared by developer. To me is like they only give you five working days to file defect after collect the key.

And the electric and water are quite common, first clause it said developer have to provide all infra on electric and water. Then purchaser need to pay them deposit when they request. So if both have been done, then on your VP date the water and electric supply should be available when you got the key

Thia is very weird, my experience with two developers, both never impose such stringent rules on defect submission. You may ask your SPA lawyer if such requirement is valid. Or you may try to call House Buyer Association(HBA) or HDA for advise. I did call HBA in 2016 due to dispute of LAD with developer, they at first call and ask me give them 70% discount on the amount if I wan to get the key soon. So I call the helpline and their volunteers lawyer only ask me for the developer name and registration number, then next day the developer call and say there is misunderstanding and ask me to confirm the date for appointment