This discussion clarifies when a Permanent Alternate Accommodation Agreement (PAAA) can be registered during property redevelopment. The consensus is that the PAAA can be registered at any time, either before or after vacating the flat, as there is no specific legal requirement dictating the timing of its registration. The developer's suggestion to register it after vacating and receiving a completion certificate (CC) is questioned, with the understanding that redevelopment projects typically take longer than a year.