We are working on a project wherein the interior fit-out work will be carried out in 2 phases. Consequtively the occupancy will  be in 2 phases aswell.

The project proposes to complete the interior works of one half of a floor, then conduct pre-occupancy flushout and then occupy that part of the floor. Meanwhile the interior work on the other half of the same floor will continue. Upon completion, carry out pre-occupancy flushout for the other half followed by occupancy. 

Is it acceptable to conduct the flush-out in 2 phases for the same floor?