Advanced Nanotechnology Ltd - Harold Clough has stepped down as chairman of the company, in favour of David Griffiths, who has been a director since 2003. Allied Gold Ltd - Anthony Lowrie has been appointed as non-executive director. Australian Waterwise Solutions Ltd - John Chegwidden and Anthony Lewis have been appointed as directors. ELK Petroleum Ltd - Matthew Wood has resigned as non-executive director. Ferrowest Ltd - Neville Bassett has resigned as joint company secretary. Heritage Gold NZ Ltd - David Williams and Ralph Stagg have resigned as directors. Geoffrey Hill has replaced Murray McKee as chairman, with Mr McKee remaining with the company as deputy chairman. Hodges Resources Ltd - Peter Mullens has been appointed as non-executive chairman. Lafayette Mining Ltd - Steve Wood has been appointed as non-executive director. Macro Corporation Ltd - Reginald Hare has been appointed as director and joint company secretary. Benny Louis has also been appointed as a director. Non-executive directors Daniel Carducci and Dato Rajakumaran have been appointed as executive directors. Maurice Gerkens has resigned as executive director and Gerard Fernandez as a director. Matilda Minerals Ltd - Kim Massey has been appointed as company secretary after the resignation of Nikki Telfer. Norwest Energy NL -- William Bloking has been appointed as non-executive director. Otto Energy Ltd - Emma McCormack has been appointed as company secretary following the resignation of Nicki Telfer. Prime Minerals Ltd - Vincent Hyde has been appointed as company secretary following the resignation of Bruce Waddell. Prosperity Resources Ltd Mo Munshi has been appointed as director and non-executive chairman. Zylotech Ltd - John Wayland has been elected chairman in place of Andrew Unterweger, who will continue as a director of the company.