(1)The competent authority must maintain the official list.
(2)The competent authority may admit to the official list such securities and other things as it considers appropriate.
(3)But—
(a)nothing may be admitted to the official list except in accordance with this Part; and
(b)the Treasury may by order provide that anything which falls within a description or category specified in the order may not be admitted to the official list.
(4)The competent authority may make rules (“listing rules”) for the purposes of this Part.
(5)In the following provisions of this Part—
“security” means anything which has been, or may be, admitted to the official list; and
“listing” means being included in the official list in accordance with this Part.