(1) In this Chapter -
"certificate of reasonable cost" means a certificate granted by the Minister for the Environment for the purposes of section 66, 67, 68 or 69, as the case may be, stating that the amount specified in the certificate in relation to the cost of construction of, conversion into, refurbishment of, or, as the case may be, construction or refurbishment of, the house to which the certificate relates appears to the Minister at the time of the granting of the certificate and on the basis of the information available to the Minister at that time to be reasonable, and section 18 of the Housing (Miscellaneous Provisions) Act, 1979, shall, with any necessary modifications, apply to a certificate of reasonable cost as if it were a certificate of reasonable value;
"certificate of reasonable value" has the meaning assigned to it by section 18 of the Housing (Miscellaneous Provisions) Act, 1979;
"designated island" means any of the following islands, that is to say - (a) in t