This item is authorised by the following titles:
Post and Telegraph Act 1974 (Act No. 61, 1974 | C2004A00119)
Radio-telephone Exchange Service Regulations (Amendment) (SR 1973 No. 192 | C1973L00192)
Radio-telephone Exchange Service Regulations 1956 (Amendment) (SR 1960 No. 30 | C1960L00030)
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