The maintenance of a building in a draft heritage conservation area comprising only--
(a) painting, plastering, cement rendering, or cladding, or
(b) the repair or replacement of an external window, glazing areas or a door (other than those on bush fire prone land), or
(c) the repair or replacement of a non-structural wall or roof cladding, or
(d) the repair or replacement of a balustrade,is development specified for this code if it is not constructed or installed on or in, or in relation to, a heritage item or draft heritage item.