4.—(1) Paragraph 5 is subject to paragraph 6.
(2) Paragraphs 5 and 6 are subject to sub-paragraph (b) of paragraph 7 for determining the quantity of explosives to be applied —
(a)for determining the relevant separation distance for the purposes of paragraphs 5 and 6, and
(b)for paragraph 1(7) in relation to the radius for a reference zone,
in cases where sub-paragraph (b) of paragraph 7 is being relied on.