3. Notwithstanding anything in paragraph 2, liquid fuel—N.I.
(a)when not pre-packed may be sold by volume, and
(b)may be pre-packed in a container marked with an indication of quantity by volume,
being in either case the volume of the gas which would be produced from the fuel in question at such temperature and such atmospheric pressure as are specified in regulations made by the Department with respect to fuel of the type in question or, if no such regulations are in force, as may be made known by the seller to the buyer before he pays for or takes possession of the fuel; and there shall be exempted from all requirements of paragraph 2 goods of any description in a quantity of less than[F1 250 grams] or of less than[F1 250 millilitres].
F1SR 1995/227