Om Yentieng, who is head of the Anti-Corruption Unit, said he had the statue erected “without prior permission and by my own decision."
Mu Sochua plans to stay through June 25, to submit her petition to the administration and to take part in the screening of the film.
The regulation, signed by Prime Minister Hun Sen May 31, calls on authorities to make lists of squatter communities.
His visit also comes as Cambodian officials are facing criticism from the opposition for its border demarcation policies.
The members will focus on political stability, security, social order, human and drug trafficking, economics and social matters.
Cambodia’s youth outstrips the rest of the population by a growing margin, but youth advocates say their voices still go unheard.
Sam Rainsy is facing a two-year sentence on charges related to uprooting border posts near Vietnam in Svay Rieng province last year.
Mu Sochua told VOA Khmer she has no intention of paying the fine.
Sam Rainsy is currently on a visit to the US to build political support for his party, which holds 26 seats in the National Assembly.
The two governments are currently in the process of marking the borders according to agreements from 1985 and 2005.
The National Assembly and Senate established their representatives on a new anti-corruption council on Tuesday.
Cambodian and Thai troops engaged in a brief exchange of gunfire on Tuesday, but neither side reported injuries.