Moe Gyo said that Thai police inspected farms, crafts workshops and small businesses, mostly focusing on workplaces that are not officially registered.
The Thai government is stepping up efforts to boost the Rangoon-Mae Sot trade link by approving a 1.8 billion baht ($53 million) budget to help Burma develop part of its road along the transnational route.
According to a new Thai law laid down in March, all security guards must be Thai citizens.
Construction work has begun on Thai-Burmese SEZin Mae Sot, Tak province, with many additional labourers needed according to the director of construction.
An eight-month-old Burmese girl, abducted in broad daylight, has been returned to her mother after CCTV footage of the kidnapping went viral.
CCTV footage shows a woman making off with the infant in a white vehicle.