§ 339-bb. Insurance. The board of managers shall, if required by the declaration, the by-laws or by a majority of the unit owners, insure the building against loss or damage by fire and such other hazards as shall be required, and shall give written notice of such insurance and of any change therein or termination thereof to each unit owner. In the case of a qualified leasehold condominium, such insurance shall be required in any event, and shall be in an amount equal to full replacement cost of the building. The policy or policies of such insurance shall be updated annually to maintain such insurance in such amount. Nothing herein shall prejudice the right of each unit owner to insure his own unit for his own benefit. The premiums for such insurance on the building shall be deemed common expenses, provided, however, that in charging the same to the unit owners consideration may be given to the higher premium rates on some units than on others.