The South Dakota House of Representatives voted 49-13 on Thursday to require the use of E-Verify by employers in the state to check employees’ eligibility to work in the United States.

E-Verify is a free federal government website that compares records from the U.S. Department of Homeland Security and the U.S. Social Security Administration to the information on an employee’s I-9, which is an employment verification document that must be filed by employers for all new employees, including U.S. citizens.

If there’s a discrepancy between I-9 information and records uncovered through an E-Verify check, employers are notified and employees have a chance to correct the discrepancy.

The federal government and its contractors are required to use E-Verify. If House Bill 1209 becomes law, South Dakota would be the 10th state to mandate E-Verify use by all employers. The bill now heads to a state Senate committee.