3.—(1) Waste of the following descriptions shall not be treated as household waste for the purposes of section 33(2) (treatment, keeping or disposal of household waste within the curtilage of a dwelling)—
(a)any mineral or synthetic oil or grease;
(b)asbestos; and
(c)clinical waste.
(2) Scrap metal shall not be treated as household waste for the purposes of section 34 at any time before 1st April 1993.