This Division sets out the development standards that apply to the following types of complying development under this code--
(a1) the conversion of an existing dwelling to a dual occupancy,
(a) the erection or alteration of, or an addition to, a dual occupancy where no part of a dwelling is located above any part of another dwelling,
(b) the erection or alteration of, or addition to, attached development that is related to any such dual occupancy.
Note : Clauses 1.17A, 1.18 and 1.19(1) set out additional requirements for complying development.