[4(1)If [a notice is served] under paragraph 2 in a case where a superior landlord has effected, in whole or in part, the insurance of the dwelling in question and the landlord [on whom the notice is served] is not in possession of the relevant information—E+W
(a)he shall in turn [by notice in writing require the person who is his landlord to give him the relevant information] (and so on, if that person is not himself the superior landlord),
(b)the superior landlord shall comply with [the notice] within a reasonable time, and
(c)the immediate landlord shall then comply with the tenant’s or [secretary’s notice] in the manner provided by sub-paragraphs (4) to (7) of paragraph 2 within the time allowed by that paragraph or such further time, if any, as is reasonable in the circumstances.
(2)If, in a case where a superior landlord has effected, in whole or in part, the insurance of the dwelling in question, a [notice under paragraph 3 imposes a requirement relating] to any policy of insurance effected by the superior landlord—
(a)the landlord [on whom the notice is served] shall forthwith inform the tenant or secretary of that fact and of the name and address of the superior landlord, and
(b)that paragraph shall then apply to the superior landlord in relation to that policy as it applies to the immediate landlord.]