
It wants to oust the Samak Sundaravej administration, which it regards as corrupt and a proxy of ousted PM Thaksin Shinawatra.
Chamlong urged PAD supporters to join the protest on Tuesday morning at 7am but refused to say to where the demonstrators would march. He insisted the PAD was not calling for a coup and added that even if it did the military would not comply.
The PAD leadership will inform demonstrators on Tuesday morning where they will march. Sites have been targeted, especially the proposed Parliament building at Kiak Kai, a project that he described as "a waste of money".
He insisted that the demonstrators would not besiege Government House. The march will be peaceful and will not destroy public property.
Chamlong denied that Tuesday's gathering was a way to end the marathon rally, now reaching 90 days. He added that the group's leaders were not seeking any political gain either, because "we're not politicians".
The rally, he said, would continue until the government resigned. He defended the move as better than "analysing politics on a daily basis".
Chamlong denied a claim by deputy government spokesman Nattawut Saikua that there had been conflict within the PAD, saying the rally would not have lasted 91 days if conflict truly existed.
He added that he was confident police would keep pro-Thaksin supporters - who will also hold a rally on the same day at Chatuchak Park - at bay.
Meanwhile, Pracha Prasopdee, People Power party MP for Samut Prakan, questioned the PAD's motive, saying that perhaps Chamlong or Sondhi Limthongkul wanted to become prime minister.
Pracha added that if the PAD wanted to support opposition leader Abhisit Vejjajiva as PM, then Abhisit should appear at the PAD rally.
Many pro-Thaksin, anti-coup groups such as Saturday People Against Dictatorship, taxi-drivers and White Doves, will meet, discuss the situation and hold a press conference on Tuesday. They expect to hold their own rally at Sanam Luang on Friday.