But some experts say the monarch has limited influence in a CPP-dominated political landscape.
A Buddhist monk and Muslim leader say the move would help quell ethnic violence.
Shwe Mann says the charter had a new government in mind for the country.
The opposition threatens to boycott after rejecting election results.
The opposition warns of a parliament boycott, more protests.
Opposition chief Sam Rainsy says demonstrations will be stepped up.
The talks come as the central government approves a license for a Shan newspaper.
Civil society groups declare the election process not free or fair.
But the Constitutional Council rejects opposition poll complaints.
Constitutional review committee members must keep mum on their deliberations until the end of the year.
Human Rights Watch slams Prime Minister Hun Sen for 'delay tactics.'
Sam Rainsy appeals to King Norodom Sihamoni as time runs out.
In an unusual move, police stop a group of 100 villagers from traveling to a nearby province
An ICRC team's visit comes amid heavy clashes between rebels and government troops.
Rights groups urge Cambodia not to forget Boeung Kak campaigner Yorm Bopha.
The opposition holds a protest rehearsal while riot police test crowd-control measures.