Fixed assets migration during the year - Declining balance method

My client follows Oct to Sep calendar year and are planning to move their FA assets from one of their legacy FA system into Oracle FA as on FEB period ( new CORP book FA 12.1.3). Majority of their assets use Declining balance method. Since the migration is happening during the year how does FA handle depreciation on these assets? Would it take the WDV as on 31-Jan and calculate Depreciation irrespective of the Accumulated depreciation and YTD depreciation as on Jan period provided from legacy system? Any help is appreciated.