The articles of membership represent a treaty agreement. This agreement was ratified by the Twi'lek Clan Assembly and formalized the inclusion of Ryloth and other Twi'lek settlements into the Galactic Republic. This signing occurred in the period known as the High Republic Era.
The initial reference to the Clan Assembly appears in the 2021 audio drama The High Republic: Tempest Runner. This audio drama was authored by Cavan Scott and featured a complete ensemble of voice actors.