Cambodia last went to the polls in 2013 amid evidence of widespread voter fraud, intimidation, and political violence.
Firefighters who are found to have damaged people’s property under the draft could face up to a year in jail.
The CNRP boycotted both the parliamentary and Senate votes this month.
The planned amendments, which would ban the opposition from associating with its former leader, Sam Rainsy, were due to be passed on Tuesday.
Currently women account for just 12 percent of local government officials, according to the government.
More than 1.5 million Cambodians are thought to work in Thailand, many undocumented, along with tens of thousands in Malaysia and South Korea.
The opposition Cambodia National Rescue Party marked its five-year anniversary last week with a meeting of party officials in Hong Kong.
A slew of arrests of opposition and civil society members in the past year indicate that the CPP plans to hold on to power at any cost in 2018.
Sam Rainsy announced his return via his Facebook page, saying “I will return to Cambodia in 2018."
Hin Van Sreypov, 37, a market vendor in Poipet, was arrested in Phnom Penh while she attended the one-year remembrance ceremony for Kem Ley.
Sam Rainsy wrote on his Facebook page this week after the CPP passed amendments to the political parties law on Monday that the CPP was trying to “politically kill” him.