After nearly a year of boycotting parliamentary sessions, all 55 lawmakers-elect of the opposition Cambodia National Rescue Party took the oath of office Tuesday.
The oath was taken two weeks after the CNRP and the ruling Cambodian People's Party of Prime Minister Hun Sen agreed to settle their political differences through mutual compromise on various knotty issues, including reform of the National Election Committee and leadership of the National Assembly.
The CNRP lawmakers took their oath in the Royal Palace in the presence of King Norodom Sihamoni.
Prime Minister Hun Sen welcomed the opposition lawmakers and vowed to work with them for the development of the country.
"I welcome all 55 lawmakers from the CNRP who take oath today in order to officially accept their roles and responsibilities as full-fledged members of the National Assembly," Hun Sen wrote on his Facebook account.
According to Cambodian law, lawmakers are elected only after they have taken oath of office.
Yim Sovann, spokesman for the CNRP, told Kyodo News after the swearing-in ceremony, "All of us are committed to what we have pledged in our swearing-in such as protection of the country's territorial integrity and interest".
The CNRP boycotted National Assembly sessions from September last year to protest the official results of the July 2013 general election that showed the CPP winning 68 seats.
The CNRP had demanded a thorough investigation into alleged irregularities in the election, while also calling for a fresh vote and reform of the National Election Committee.