20.The SIAC shall collect advances and deposits from the parties towards the costs of the arbitration. 21.The first tranche of advances and deposits shall normally be required from the parties shortly after the commencement of the arbitration or request for administration. 22.The Registrar may from time to time request further advances and deposits from the parties. 23.Unless the Registrar directs otherwise, such advances and deposits shall be payable by the parties in equal shares. For the avoidance of doubt, the Registrar may fix separate advances on costs for claims and counterclaims, respectively. 24.All advances and deposits shall be made to and held by the SIAC. Any interest which may accrue on such advances and deposits shall be retained by the SIAC.