1(1)Subject to the provisions of this Schedule, the rateable value of lands and heritages for the purposes of section 24 of this Act shall be the rateable value ascribed to them in the valuation roll in force for the area in which the lands and heritages are situated or, if the lands and heritages are not included in that roll, the rateable value subsequently ascribed to the lands and heritages in a valuation roll in force for that area.
(2)If the relevant period of vacancy in respect of lands and heritages begins before the time when the valuation roll relating to a year of revaluation comes into force for the area of a rating authority and the lands and heritages were not included in the valuation roll for the preceding year, then—
(a)if within 28 days of the receipt by him of a notice under section 9(4) of the [1956 c. 60.] Valuation and Rating (Scotland) Act 1956 or of a completion notice in respect of the lands and heritages concerned the owner so requests the assessor, the assessor shall certify to him and to the rating authority the gross annual value and the rateable value which in his opinion would (in accordance with section 15 of this Act) have been ascribed to the lands and heritages if they had been included in the valuation roll for the said preceding year, and the owner and the rating authority shall be entitled to appeal or complain with respect to the value so certified as in manner provided by or under the Valuation Acts,
(b)the assessor shall, when he issues a certificate under head (a) above, send to the owner of the lands and heritages a notice of his right of appeal by virtue of the said head (a), and
(c)the owner of the lands and heritages shall, in accordance with the rateable value so certified or determined as the result of an appeal or complaint, be liable to be rated under section 24 of this Act in respect of so much of the relevant period of vacancy as fell within the said preceding year.