Whenever the real estate of any such association and the cottages and buildings thereon shall be assessed to the association and taxes paid as provided in the last preceding section, the association may assess, levy and collect from its several lessees, owners of cottages and buildings, such fair and just proportion of the taxes thus levied and paid as the value of such cottages and buildings shall bear to the total valuation of such real estate assessed in the manner aforesaid, such assessment and levy to be made in the manner hereinafter provided, and the amount to be paid by any such owner or lessee when so fixed and determined shall constitute and be a debt against such owner of and a lien upon the cottage or building thus assessed, payable with interest as hereinafter provided, and the association may enforce the payment thereof in the same manner as in the case of non-payment of rent or non-performance of any condition in the lease under which said lessee holds, and no transfer or assignment of any such lease shall be valid until such assessment or tax is paid.