WASHINGTON (AP) — President Barack Obama signed legislation Tuesday that affords greater protection to federal employees who expose fraud, waste and abuse in government operations.

Capping a 13-year effort by supporters of whistle-blower rights, the new law closes loopholes created by court rulings, which removed protections for federal whistle-blowers. One loophole specified that whistle-blowers were only protected when they were the first to report misconduct.