(ASHEVILLE) - By July 2013 every employer in North Carolina with more than 25 employees will have to start using the E-Verify system to make sure they are not hiring illegal aliens. Local governments are already supposed to be using the system.

The challenge is that it is nearly impossible to know that governments across the state are using the system. The law has no agency or body tasked with making sure governments are meeting the requirement.

"It is certainly not rare in the law that the law requires that a city or a county or other unit of government do something in a particular way without there being any particular enforcement mechanism in place," said UNC School of Government Professor Robert Joyce.

Under the law, employers with 500 or more employees are to be using the system by October of 2012. Employers with 100 or more should meet the requirement by January 2013 and employers with more than 25 workers will have to meet the requirement by July 2013. Employers with 25 or fewer workers are exempt.

The state Commissioner of Labor will handle complaints against private employers.

(Thanks to: WWNC)