36 In the case where political parties under paragraph one have an equal number of members, the matter shall be decided by drawing lots. The President of the House of Representatives shall countersign the Royal Command appointing the Leader of the Opposition in the House of Representatives. The Leader of the Opposition in the House of Representatives shall vacate office upon being disqualified under paragraph one, or where a case under section 118 (1), (2), (3) or (4) arises. In such case, the King will appoint a new Leader of the Opposition in the House of Representatives to fill the vacancy. Part 3 The Senate Section 107. The Senate consists of two hundred members installed from a selection by and among persons having the knowledge, expertise, experience, profession, characteristics or common interests or working or having worked in varied areas of the society. The division of groups shall be made in a way which enables every person having the right to apply for selection to belong to any one group. The division of groups, number of groups, and qualifications of a person in each group, the application and acceptance of application, the rules and procedures for selection among themselves, the acceptance of the selection, the number of Senators selected from each group, the listing of reserve candidates, the elevation of persons from the reserve list to fill the vacancy, and any other measures necessary to enable the selection among themselves to proceed honestly and justly, shall be in accordance with the Organic Act on Installation of Senators. For the purpose of enabling such selection to proceed honestly and justly, it may be prescribed that a candidate from each group shall be prohibited from selecting another candidate from the same group, or that candidates for selection are screened by any other means in which the candidates may participate. The undertakings under paragraph two shall be carried out from the level of an Amphoe, and the level of a Changwat, to the national level, so that a Senator is a representative of the Thai people at the national level. In the case where the number of Senators under paragraph one is not met, whether this results from a vacancy of office or any other cause other than the expiration of term of the Senate, and where no list of reserves remains, the Senate shall consist of the remaining Senators. However, in the case where the number of Senators remaining is less than one-half of the total number of Senators and the remaining term of the Senate is more than one year, a selection of Senators to fill the vacancy shall be carried out within sixty