local myBuilding = 
{
    DataType = "BUILDING",
    ...
}

if (foundation.getGameVersion == nil or version.cmp(foundation.getGameVersion(), "1.6") < 0) then
    myBuilding.BuildingPartSetList = {
        {
            Name = "DEFAULT",
            BuildingPartList = { "CORE_BUILDING_PART" }
        }
    }
else
    myBuilding.AssetCoreBuildingPart = "CORE_BUILDING_PART"
end

mod:register(myBuilding)