10(1)Any reference in this Schedule to the cubic content of a building shall be construed as a reference to that content as ascertained by external measurement.E+W
(2)For the purposes of [F1paragraph 1] the cubic content of a building is substantially increased or exceeded—
(a)in the case of a dwellinghouse, if it is increased or exceeded by more than one-tenth or 1,750 cubic feet, whichever is the greater; and
(b)in any other case, if it is increased or exceeded by more than one-tenth.
Textual Amendments
F1Words in Sch. 3 para. 10(2) substituted (25.9.1991) by Planning and Compensation Act 1991 (c. 34, SIF 123:1), ss. 31, 84(5), Sch. 6 para. 40(2) (with s. 84(5)); S.I. 1991/2067, art.3 (subject to art. 4)