At least five Members of the same candidate list may form a parliamentary group. Members elected from the same candidate list may form only one parliamentary group and may not join another parliamentary group.
Six parliamentary groups were established in the 12th Saeima.
Currently, there are five parliamentary groups, as the parliamentary group "For Latvia from the Heart" was dissolved on 16 January 2018.
If an MP leaves a parliamentary group, he or she does not lose the Saeima mandate but becomes an unaffiliated member of parliament. Starting with the 10th Saeima, MPs elected from the same candidate list may belong to only one parliamentary group and may never join another one.
Individual parliamentary groups may form political blocs, and unaffiliated MPs may join these blocs.
In order to coordinate the work of parliamentary groups and political blocs and to decide matters not addressed in the Rules of Procedure, the Council of Parliamentary Groups has been established. It consists of members of the Presidium and one MP from each parliamentary group and political bloc. The opinions and recommendations of the Council of Parliamentary Groups are purely advisory.
The Presidium draws up the agenda of meetings of the Council of Parliamentary Groups and convenes its meetings. The Speaker or one of the Deputy Speakers chairs the meetings.