Political parties and Parliamentary Groups in the Senate
The political profile of the Senate varies depending on election results and appointments made by regional parliaments, whose configuration depends on the respective regional elections.
Senators form parliamentary groups according to their political preferences. Said groups are normally determined by common membership of a political party, although certain groups are composed of senators from two or more political parties.
Each parliamentary group will be composed of at least ten senators. Senators may not be members of more than one parliamentary group.
Within five working days from the constitution of the Senate, senators resolving to form a parliamentary group will provide the President of the House with the list of names of its members. Said list must be signed by all members of the Group and indicate the name of the group and the name of the senator who will act as its speaker, as well as his/her substitutes. The list of members of each parliamentary group will be published. They must adopt a name that conforms to that under which the members stood for election.
The various parliamentary groups that are created may be joined by senators who express their desire to do so in writing to the President of the House. Said notice must include the approval of the group's speaker. Senators who have not joined a parliamentary group will become part of the Joint Group.
The Joint Group includes Senators from parties or coalitions that have not achieved the minimum number required to form their own group and, therefore, its composition is politically varied. Senators who for any reason cease to belong to a parliamentary group with a specific name and those who have not joined a parliamentary group will be automatically included in the Joint Group, unless they join one of the other groups in the term of three days. The Speaker of the Joint Group or the Speaker of any of the other groups will serve notice of new members to the President of the House.
The various parliamentary groups constituted in the Senate will be fully autonomous in terms of their internal organization.
The Senate will provide the parliamentary groups with subsidies according to the number of members plus the same fixed supplement for all groups.
The parliamentary groups made up of senators elected in the region or by the Legislative Assemblies or higher official bodies of two or more autonomous communities may include regional groups. Senators may not be members of more than one regional group.
Each regional group will comprise at least three senators elected by the electorate of the region or designated by the autonomous community in question.
Regional Groups may participate in the cases and in the manner provided in the Standing Orders of the Senate.
Senators who resolve to form regional groups must provide the President of the House with a list of names of members through their respective parliamentary groups. Said list must be signed by the
Speaker and all members of the Parliamentary Group to which they are attached. It must also indicate the name of the Group, referring expressly to the region and party, federation, coalition or grouping to which its members belong, together with the name of its representative and his/her substitutes.
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