Unit of assessment.

All lands or buildings, to the extent they are contiguous or are within the same cartilage or are on the same foundation and are owned , by the same owner or co-owners as an undivided property, shall be treated as one unit for the purpose of assessment under this chapter: Provided that if such land or building is sub-divided into separate shares which are not entirely independent and capable of separate enjoyment, the Chief Municipal Officer may, on application from the owners or co-owners, apportion the valuation and assessment of such land or building among the co-o value of their respective sti:.ares , treating the e . rz: ~-=:- =_ - as a single unit.