The National Assembly will next week announce the validity of 16 new lawmakers from the ruling CPP and Funcinpec Party.
The Supreme Court dissolved the opposition CNRP on treason charges earlier this month, banning 118 senior members from politics for five years.
New lawmakers from three minor political parties were sworn in Tuesday to replace 44 of 55 former CNRP parliamentarians in the National Assembly.
The 44 lawmakers from the royalist party Funcinpec, the Cambodian Nationality Party and the Khmer Economic Development Party took their oaths in front of King Norodom Sihamoni at the Royal Palace on Tuesday.
Eleven seats were rejected by the League for Democracy Party and the Anti-Khmer Poverty Party.
Four CPP lawmakers have since resigned to run in the Senate election and one Funcinpec party lawmaker resigned to join the National Election Committee.
Chheang Vun, spokesman for CPP lawmakers, said 16 new replacement lawmakers will be validated on Thursday.
Mr Vun said that 15 of the lawmakers will be from the CPP and one will be from Funcinpec.
CPP lawmakers Sok Eysan, Hem Khorn, Mom Chhim Huy and Ay Khorn resigned to run for the Senate election. They will be replaced by Sok Born, Ouk Damry, Dom Yuk Hean, and Poeu Samy.
Funcinpec lawmaker Nuth Sakhom resigned from the National Assembly to join the NEC. He will be replaced by a fellow party member.
“We will announce the validity of them on December 7 and all 16 new lawmakers will take oaths at the Royal Palace,” said Mr Vun.
Mr Vun said that all replacements for NEC seats vacated by former CNRP members who resigned after their party’s dissolution will also be filled that day.
NEC members from the CNRP, Kouy Bunroeun, Rong Chhun and Te Manirong resigned after the CNRP was dissolved. They will be replaced by Mr Sokhom, Dim Sovannarom, former spokesman for the ECCC, and Hel Sarath, from the Cambodian Nationality Party.
The NEC was revamped with nine senior leaders in April 2015 under a political agreement between the CPP and the CNRP.