# The Building (Inner London) Regulations 1987, Paragraph 1


The London Building Acts (Amendment) Act 1939 shall have effect—
(a) in section 4, in the definition of “domestic building”, with the omission of the words from “and for the purposes of Part V” to the end of that definition;
(b) in section 21, with the substitution for subsections (4A) and (4B) of the following:—
“(4A) Subsection (4) of this section shall not apply if:
(a) the width of any opening in any wall of a storey (or if there is more than one opening in any such wall, the width of all such openings taken together) does not exceed one-half of the length of the wall, and
(b) each opening is closed by two steel plate doors, metal covered doors or steel rolling shutters, one on each side of the wall, and
(c) those doors or shutters are—
(i) constructed in accordance with specification 1 or 2 or 3 or 4, and
(ii) installed in accordance with the general installation requirements of the Rules for the Construction and Installation of Firebreak Doors and Shutters of the Fire Offices' Committee, dated February 1985.”
(c) in section 34(1), with the insertion, after proviso (ii)(B), of the following—
“or (C) a building to which section 4(1)(a) of the Building Act 1984 applies.”;
(d) in section 35(1), with the insertion, before paragraph (iii) of the proviso, of the following paragraph—
“(ii) the provisions of this subsection shall not apply to any building to which section 4(1)(a) of the Building Act 1984 applies; and”
(e) in section 145, with the omission of subsection (4)

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Source: https://www.legislation.gov.uk/uksi/1987/798/schedule/3/paragraph/1 (the official version)
Page: https://openlegislation.uk/building-inner-london-regulations-1987/schedule-3/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.