Each “ strata” needs to be administered separately. Each one is its own legal entity.
But you need to refer to the strata plan of each to define what belongs to each strata.
Areas common to each strata would fall under a community title. Again the plans will show what is community property.
Each strata contributes to the maintenance of the community property.
The community plan is also administered by a separate committee, comprising members from each strata building.