3.—(1) If a unit packet of cigarettes contains a lining as part of its internal packaging—
(a)the lining must be a silver coloured foil with a white paper backing, and
(b)there must be no variation in the tone or shade of the foil.
(2) Paragraph 1 does not prohibit such a lining from being textured over any entire surface with small dots or squares embossed on the lining if—
(a)that texture is required for the purpose of—
(i)the automated manufacture of the lining, or
(ii)the packing of cigarettes into the packet, and
(b)the dots or squares—
(i)are equidistant from each other,
(ii)are of uniform size, and
(iii)do not form a picture, pattern, image or symbol that is recognisable as anything other than a lining.