The investigation
10 On 26 February 2007, Ms Melissa Martino, an inspector employed by the ABCC commenced a proceeding in the AIRC seeking the revocation of a permit held by Mr Adrian McLoughlin ("the McLoughlin proceeding"). The permit enabled Mr McLoughlin to enter and inspect certain premises in accordance with Pt 15 of the WR Act.
11 In the AIRC proceeding, Ms Martino filed witness statements of Craig Peterson and Stephen Broadhead on 4 April 2007. Mr Peterson and Mr Broadhead are each employed in a managerial capacity by a construction company called Bovis Lend Lease Pty Ltd ("Bovis").
12 The ABCC has raised an allegation contained in a notice sent to the first applicant, Mr Washington, to answer questions relevant to an investigation undertaken by it (being the investigation the subject of this matter) that the second applicant, Mr Setka, engaged in threatening, intimidating and prejudicial conduct towards Mr Peterson. The conduct was said to have occurred at a barbecue at Docklands Park on 23 May 2007 and to consist of derogatory comments made about Mr Peterson and also by Mr Setka including a direction to those at the barbecue to call Mr Peterson, "Lassie". The purported reason for the alleged conduct was that Mr Peterson had provided information to the AIRC and proposed to appear as a witness before it in the McLoughlin proceeding.
13 The ABCC has also raised an allegation that, on 20 June 2007, at a building site at 500 Collins Street, Melbourne, Mr Setka and/or Mr Washington and the third applicant, Mr Mier, threatened, intimidated or prejudiced Mr Peterson and Mr Broadhead by distributing a flyer which contained derogatory comments about them allegedly because they each provided information to the AIRC and each proposed to appear as a witness in the McLoughlin proceeding.
14 On 10 and 11 July 2007 respectively, Mr Broadhead and Mr Peterson gave evidence in the McLoughlin proceeding in the AIRC before Watson SDP.
15 In a decision published on 29 August 2007, in Re Australian Building and Construction Commission [2007] AIRC 717 at [233], Watson SDP ordered the suspension of Mr McLoughlin's permit until 31 October 2007 and ordered him in the interim to:
…undertake appropriate training about the rights and responsibilities of a permit holder under Part 15 of the Act, and the relationship of those rights and responsibilities with entry rights under the Victorian OHS Act and appropriate legislative means of challenging allegedly unreasonable requests on behalf of occupiers.
16 The ABCC has raised further allegations that on 6 September 2007, outside the Yarra Arts site, Mr Setka threatened, intimidated or prejudiced Messrs Peterson and Broadhead allegedly because each of them had provided information to the AIRC and appeared as a witness in the McLoughlin proceeding. It is alleged that Mr Setka made threats of violence to Mr Peterson and assaulted Mr Broadhead.
17 By letter dated 6 September 2007, Mr Warren Cruse, an investigator employed by the ABCC, wrote to Mr Washington, requesting that he attend for an interview "in furtherance to" an investigation by the ABCC into "a suspected contravention of section 816 of the Workplace Relations Act 1996".
18 On 8 October 2007, the ABCC served a notice on Mr Washington requiring him to answer questions at an investigation. The notice was dated 28 September 2007. The investigation was said to concern suspected contraventions of s 816 of the WR Act by Mr Setka and Mr McLoughlin at four named construction sites.
19 After correspondence between the ABCC and the legal officer of Mr Washington's union, the Construction Forestry Mining and Energy Union ("CFMEU"), the ABCC, by letter dated 22 October 2007, withdrew the notice dated 28 September 2007 directed to Mr Washington.
20 On 30 October 2007, the ABCC served a further notice on Mr Washington dated 29 October 2007. It differed from the 28 September 2007 notice in the following material respects:
· only 3 construction sites were listed;
· Mr Washington and Mr Mier were now also under investigation in respect of the alleged breaches of the WR Act;
· Mr McLoughlin was no longer subject to the investigation;
· the suspected contraventions were particularised as set out at [12], [13], [16] and [17] above in respect of the events of 23 May 2007, 20 June 2007 and 6 September 2007 (twice).