PHNOM PENH, Feb. 22 (Xinhua) -- The election for the four mandate of the Cambodian Senate, or the upper house, is ready to kick off on Sunday, a spokesman said on Thursday.

Four political parties are standing in the election: the ruling Cambodian People's Party (CPP) of Prime Minister Samdech Techo Hun Sen, the Funcinpec Party of Prince Norodom Ranariddh, the Cambodian Youth Party, and the Khmer National United Party.

"The Senate election will be voted by 11,695 people who are all 123 members of parliament and 11,572 commune councilors," Hang Puthea, a spokesman for the National Election Committee, told Xinhua, adding that they will cast their ballots at 33 polling stations across the kingdom.

He said the senate has 62 seats, but the election will be held for 58 seats only, as two senators will be appointed by King Norodom Sihamoni and two others by the National Assembly, or the lower house.

A total of 276 observers from 12 organizations had registered to monitor the election, he added.

According to the spokesman, a preliminary result will be announced on Sunday afternoon, as the official one will be on March 3 if there is no complaint filed by any political parties against the result.

The senate election is held in every six years. The last one was conducted in Jan. 2012.