25(1)If, immediately before the commencement of this Act, a certificate of a local authority under section 26(1) of the M1Housing Repairs and Rents Act 1954 or a certificate of a sanitary authority having effect as if it were a certificate under Part II of that Act had effect, by virtue of paragraph 3 of Schedule 7 to the M2Rent Act 1957 and paragraph 18 of Schedule 16 to the M3Rent Act 1968, as a certificate of disrepair under Schedule 9 to the Act of 1968, then, after the commencement of this Act, the certificate shall have effect to the like extent as before that commencement, as if it were a certificate of disrepair under Schedule 6 to this Act.E+W
(2)Where any such certificate ceases to have effect (whether by virtue of an order of the court or in consequence of being cancelled by the local authority) sections 27 and 28 of this Act shall have effect, in relation to any rental period beginning after the date as from which the certificate ceases to have effect as if it had ceased to have effect immediately before the basic rental period (within the meaning of Part II of this Act).