(1) The definition of dwelling in section 72(2) of the Act is hereby further varied by including as a dwelling, subject to paragraph (2) below, any lands and heritages or parts thereof–
(a) which constitute, or form part of, a prison;
(b) which are used as one or more of the following:–
(i) a cell (other than a special punishment cell);
(ii) a common recreational area (other than a sports hall or an uncovered area);
(iii) a library;
(iv) a chapel;
(v) a kitchen;
(vi) a dining room;
(vii) toilets;
(viii) personal washing facilities;
(ix) a laundry for the exclusive use of prisoners;
(x) a storage area which is within a cell block and which is used in connection with other premises covered by this sub-paragraph;
(xi) a corridor linking premises covered by this sub-paragraph; and
(xii) boiler or plant room which to any extent serves other premises covered by this sub-paragraph; and
(c) which would, but for the provisions of section 73(1) of the Act–
(i) be entered separately in the valuation roll; or
(ii) in the case of parts of lands and heritages, form part of a separate entry in the valuation roll.
(2) There shall not be included as a dwelling, or part of a dwelling, any kitchen, dining room, toilets or personal washing facilities which are provided for the exclusive use of persons employed in the prison in question.