2Where the relevant date falls within four months of the commencement of this Act, the declaration required by the said paragraph (b) to accompany a notice of increase may, in lieu of being such a declaration as is specified in the foregoing paragraph, be a declaration that during such period of three years as may be specified in the declaration, being a period falling within the four years ending with the relevant date, work of repair of a general description specified in the declaration has been carried out on the dwelling-house to a value not less than six times the amount of the statutory repairs deduction.