(1)Subject to the provisions of this section, no furnace in any building shall be used—
(a)to burn pulverised fuel; or
(b)to burn, at a rate of one ton an hour or more, solid fuel in any other form or solid waste;
and no oven in any building or on any land shall be used to subject solid fuel to any process involving the application of heat, unless the furnace or oven is provided with plant for arresting grit and dust which has been approved by the local 'authority or which has been installed in accordance with plans and specifications submitted to and approved by the local authority, and that plant is properly maintained and used, and if a furnace or oven is used in contravention of this subsection the occupier of the building or land shall be guilty of an offence.
(2)Subsection (1) of this section shall not apply to a furnace or oven which has been installed, the installation of which has been begun, or an agreement for the purchase or installation of which has been entered into, before the appointed day.
(3)The Minister may give directions to any local authority, or to local authorities generally, requiring that any application for approval under this section, or all such applications of any class specified in the directions, shall be referred to the Minister and shall be dealt with by him instead of by the local authority, and any such application shall be so referred accordingly.
(4)Any person who has applied to the local authority for an approval under this section or is interested in a building or land with respect to which such an application is made may, if he is dissatisfied with the decision of the authority on the application, appeal to the Minister and the Minister may give any approval which the local authority might have given.
(5)Any approval given by the Minister under subsection (3) or subsection (4) of this section shall have the like effect as an approval of the local authority.