11.—(1) If the last year of the tenancy is not a year in which such cleaning, colouring, whitening, papering, painting, limewashing or other treatment as is mentioned in paragraph 7 is due to be carried out, the tenant shall pay to the landlord at the end of such last year either the estimated reasonable cost thereof or a sum equal to the aggregate of one-seventh part of that cost in respect of each year that has elapsed since such last cleaning, colouring, whitening, papering, painting, limewashing or other treatment as aforesaid, was completed, whichever is the less.
(2) If the last year of the tenancy is not a year in which the landlord is liable, under paragraph 3, to paint, gas-tar, creosote or otherwise treat the doors, windows, eavesguttering and downpipes of buildings, the tenant shall pay to the landlord at the end of such last year either one-half of the estimated reasonable cost thereof or a sum equal to the aggregate of one-tenth part of that cost in respect of each year that has elapsed since such last painting, gas-tarring, creosoting or other treatment as aforesaid, was completed, whichever is the less.
(3) In the assessment of any compensation payable by the tenant on the termination of the tenancy in respect of dilapidation, any accrued liability under the two preceding sub-paragraphs shall be taken into account.