1SFor the purposes of Ground 9 above, a certificate of the local authority for the area in which the house in question is situated, or, where the house in question is in a new town, of the development corporation established for its purposes under the M1New Towns (Scotland) Act 1968 or, in any case, of Scottish Homes, certifying that the authority, the Corporation or, as the case may be, Scottish Homes, will provide suitable alternative accommodation for the tenant by a date specified in the certificate, shall be conclusive evidence that suitable alternative accommodation will be available for him by that date.