As far as I know, an alternative to lifeguards is for the pools to be fenced and locked. All owners should have a key and be responsible for their own and their family's use. This is being done on our development this year to comply with the rules. Again in our case, the developer set up the Community and appointed an Administrator before all the units were sold but after they had finished all the building works and left the site.
I would have thought there should be some sort of handover by the developer and the Community set up before they leave the site.
An important point regarding the pools is that fencing is obviously cheaper in the long term than hiring lifeguards for the summer months, but it may be left to the community to decide on and to pay for, if the developer doesn't fence them in. I understand that the developer is awaiting the licence for the pools from the Town Hall.