In the final analysis, the question for determination is one of statutory interpretation. For this purpose, it is legitimate and appropriate to look, not only at the TI Act, but also at the TI Regulations, not to construe an overall scheme or to throw light on ambiguity in the statutory provision, but 'to ascertain what the [legislative] scheme is' (per Mason J in Brayson Motors Pty Ltd (in liq) v FCT (1985) 156 CLR 651 at 652; 59 ALR 265. When the TI Act and the TI Regulations are read together, it appears to us that what is required by s 49(7) is a statement of particulars which identify the alleged or suspected offences in a conceptual sense, in contrast to particulars of the essential factual ingredients of those offences in the particular case, such as those which an accused is entitled to have to enable him to prepare his defence: see, eg John B Bishop, Criminal Procedure 1983, pp 145-8. In our opinion, the requirements of s 49(7), as we construe them, were satisfied here. In particular, it was not necessary, in our view, that the TI warrant set out, as was suggested, 'particulars' of parties to the suspected conspiracy, the agreement alleged and its subject matter, even if, on a trial, an accused would be entitled to be informed of such matters."
27 The Full Federal Court paid particular regard to the complete legislative scheme, including the TI Regulations and the form of TI warrant prescribed by the Regulations. Their Honours said at 197:
"It will be recalled from our earlier discussion of the legislative scheme that s 46(1) provides that the eligible Judge may issue a TI warrant where, on the basis of the information given to him or her under Pt VI, the Judge is satisfied, amongst other things, that:
'(d) information that would be likely to be obtained by intercepting under a warrant communications made to or from the service would be likely to assist in connection with the investigation by the agency of a class 2 offence … in which the person is involved … [Emphasis added.]'