The Criminal Court on Wednesday decided to revoke the bail of red-shirt leader Yossawaris Chuklom, alias Jeng Dokchik.
Of the 19 red-shirt co-leaders awaiting the court's decision today, only Mr Yossawaris had his bail revoked.
The 18 others, including Jatuporn Prompan, remain free on bail.
However, the court has prohibited them from going up on stage to speak in a way to incite unrest or violate the law and from travelling abroad.
The court has also imposed other different bail conditions on individual defendants.