The group had entered Cambodia after they were unable to find work in Thailand.
The legislation now will go to the Constitutional Council for review and the country’s king for final approval.
Sam Rainsy says the CNRP will take further measures with regard to the jailing of 11 of its activists.
They are calling for lawmakers to hold a consultation with civic groups and other stakeholders.
Critics see ‘show trial’ as judges hand down seven-year and 20-year sentences to 11 CNRP members.
The loss of arable land has detrimentally affected the livelihoods of many.
The latest group stayed only two days in Ratanakiri province before making their way to Phnom Penh.
The decision comes amid calls by the United Nations, European Union and domestic NGOs for the upper house to reject the bill.
The UN obtains assurances the group will not be mistreated upon their return.
He wants to use other maps of Southeast Asia to verify border demarcations with Vietnam on Cambodia’s official map.
More than 500 are petitioning the national government to intervene to improve working conditions.
The situation is exacerbating poverty in the country, although the government is taking measures to tackle it.
The lower house approved the bill despite a boycott of the vote by opposition lawmakers.
A brutal attack on a former TV host by a powerful tycoon has sparked the event.
The rally will be held on Monday as parliament prepares to vote on the bill.
But Cambodia’s opposition says the government is in cahoots with Hanoi.
Authorities in Phnom Penh had rounded them up in June to clear the streets of “undesirables” in preparation for two public ceremonies.