The move, which has surprised some, comes four years after the government suspended the practice after widespread allegations that children were being trafficked.
Cambodia has long been viewed as a country with endemic corruption, from the lowest levels of local governance to the highest officials in power.
Kem Sokha has denied making the remarks, and has said an audio tape at the center of the allegations was doctored.
Thai Prime Minister Yingluck Shinawatra and Cambodian Prime Minister Hun Sen enjoyed close ties after Yingluck was elected.
H&M's new plan will be put into effect next year in one factory in Cambodia and two in Bangladesh.
Cambodia is now Southeast Asia's most corrupt country, surpassing Laos and Burma on Transparency International's annual corruption index.
Cambodia ranked 160 of 175 countries in the report, with its index score a mere 20 out of 100.
The government is seeking legal action against the only remaining opposition newspaper, claiming it defamed the military in an article it published last month.
A major fire has engulfed a paper factory in Phnom Penh, costing the own more than $4 million.
Opposition officials said Monday that corruption has meant the abuse of international aid.
The EU has moved to ban fish imports from Cambodia and two other countries, in a move to sanction illegal fishing operations under flags of convenience.
Court officials said Friday they have no plan to “push” police to arrest a former governor who is accused of wounding three garment workers in a shooting incident last year.