6(1)Section 6(1) (arrestment plant for new non-domestic furnaces) does not apply to a furnace which was installed, the installation of which began or an agreement for the purchase or installation of which was entered into before 1st October 1969 (which was the day appointed for the coming into force of the enactments replaced by section 6).E+W+S
(2)Subject to sub-paragraph (3), section 8(1) (arrestment plant for furnaces burning solid fuel in other cases) applies in relation to a furnace to which, by virtue of sub-paragraph (1), section 6 does not apply as it applies to a domestic furnace.
(3)Section 8(1) does not apply to a furnace which was installed, the installation of which began or an agreement for the purchase or installation of which was entered into—
(a)in relation to a furnace in England and Wales, before 1st June 1958 (which was the day appointed as respects England and Wales for the coming into force of the enactments replaced by section 8); and
(b)in relation to a furnace in Scotland, before 15th November 1958 (which was the day so appointed as respects Scotland).