The reading had already been postponed from August 25, when four defendants were absent, but the court did not issue arrest warrants against them.
The next reading was postponed until December 22.
The rally was part of the defunct People’s Alliance for Democracy’s movement against the elected government of then-premier Samak Sundaravej, whom they regarded as strongly connected with former prime minister Thaksin Shinawatra.
The four-day occupation in August 2008 also involved weapons, which caused damage to property in the government-run building.
In 2014, the Appeals Court found the defendants guilty of criminal association, armed intrusion and threatening forceful attacks. The rally leader, Thanet Khamchoom, was also found guilty of carrying guns in public and possessing radio equipment without a licence.