Although the chacacter of a 'matter' in no way
depends upon the belief of the chairman, his
knowledge of a matter (that is, of past,
present or future facts and of facts ihe
existence or future occurrence of whach may
reasonably be suspected) as material to the
belief which he must form if the vower undec
s.155(1) as to be validly exercised. That
belief is that the person to whom the notice
2s to be given is capable of furaishing
anfocmation, producing documents or giving
evidence relaling to the facts known or
suspected. Tt 2.8 not necessary that he should
believe that the information, documents or
evidence will establish or tend to establish a
contravention, but merely that they relate to
che matter. Information, decuments and
evidence which tend to negative a suspecred
contravention or liability to conviction or
whach tend to exculpate a person suspecred to
be a parly to a contravention or offence are
as much within the ambit of $.155(1) as
aunformation documents or evidence which tend
an the other 6.reection. Thus, an ainquary
under s.155 may relate to a defence or
possible defence under 5.85. This is hecause
'the Commission is concerned with
contraventions orc possible contraventions of
ihe Act and must consider them not oniy from
the point of vaev.r of possible civil
proceedings, but also from the point of view
Whether a prosecution shculd be brought', as
Bowen C.J. said in Rilev iickay Pitv. Ltd. v.
Bannerman (1977) 31 F.L.R. 129, at p.134. The
power conferred by s.155 1s clearly in aid of
che performance of the Conmission's Functions,
and: 'Because 1t ws part of the Commission's
funclLson to be concerned with ranvestigation of
contraventions or possibl° contraventions and
to be concerned with Getermining whether any
proceedings, Civil or cram2znal, should be
brought an respect of a contravention, vhe
Commission will, quite properly, he interested
to know whecher there is a possible defence
under 5.85(1) at p-134."