17 At the outset of the proceedings in argument, the matter was raised as a preliminary point by the respondent, and I indicated that leave would be granted to the second applicant. From the facts which emerge from the materials filed by the applicants, it is apparent that the Commonwealth Director of Public Prosecutions falls potentially within two headings under s 4(2)(c). The first is "a person against whom another person has instituted or conducted vexatious proceedings", and the second is "a person who has a sufficient interest in the matter". Firstly, the respondent has by a summons dated 5 October 2004 alleging an indictable offence against Mr Damian Bugg QC brought the Commonwealth Director of Public Prosecutions within the subsection as "a person against whom another person has instituted the proceedings", the question being whether they may be characterised as vexatious. Secondly, the Commonwealth Director of Public Prosecutions has in relation to some other summonses issued by the respondent, which allege offences against the laws of the Commonwealth, been obliged, by the provisions of s 12 of the Director of Public Prosecutions Act (Cth), to consider taking over the private prosecutions and has, in relation to those taken out by the respondent against the Hon Justice Murray and the Hon Jim McGinty, Attorney General, been obliged to take action, including instructing counsel to appear in the Perth Court of Petty Sessions and considering materials relevant to the matters. In my view, it is the public character of the obligations of the Commonwealth Director of Public Prosecutions which renders him a person with sufficient interest in the matter, being that interest raised by the statutory duty placed upon the Director where private prosecutions against laws of the Commonwealth are instituted. Thus, I determined that leave should be granted to the Commonwealth Director of Public Prosecutions, in that right, to bring these proceedings. His position is similar to those officers named in the Act as entitled to bring application and to the law officers who may initiate application for similar relief under the High Court Rules and Federal Court Rules.