The erection of a business identification sign or building identification sign that is displayed on a freestanding structure that is mounted on the ground on one or more supports is development specified for this code if--
(a) it is not carried out on or in a heritage item or a draft heritage item or in a heritage conservation area or a draft heritage conservation area, and
(b) it is carried out on land that is in a business, employment, mixed use, industrial or special purpose zone or Zone W4.