Paragraph 1
In this Schedule, “ballast” means any of the following materials, that is to say—
(a)
sand, gravel, shingle, ashes and clinker of any description;
(b)
broken slag, slag chippings, granite chippings, limestone chippings, slate chippings and other stone chippings (including such materials which have been coated with tar, bitumen or cement);
(c)
any other material commonly used in the building and civil engineering industries as a hardcore or an aggregate;
(d)
any other material commonly known in the said industries as ballast.