3. This Order applies to the following defined authorities—
(a)a local authority in Wales other than a community council;
(b)a fire authority in Wales constituted by a combination scheme under the Fire Services Act 1947(1);
(c)a joint committee which falls to be treated as a defined authority by virtue of section 1(4) of the Act and of which at least one of the constituent local authorities is a local authority within the terms of paragraph (a) above.