RALEIGH, N.C. (AP) — North Carolina Attorney General Roy Cooper is joining his colleagues in 13 other states in asking Congress to limit what for-profit schools can spend on recruitment, advertising and marketing.

Cooper and the other attorneys general sent a letter to Congress to get lawmakers to back the Protecting Financial Aid for Students and Taxpayers Act sponsored by Sens. Kay Hagan and Tom Harkin.

The bill introduced this week would restrict institutions of higher learning from using federal financial aid for recruitment, advertising and marketing purposes.

Cooper's office is part of a multistate group investigating the for-profit schools industry. His office has fielded 54 complaints in the past year, including students who say they enrolled in classes that weren't accredited, and instances of high-pressure sales tactics aimed at the military and veterans.