Facebook, Twitter and McDonald’s announcing recent layoffs – many employees may be curious if their company is next. And, a decades-old labor law, called the WARN Act, could give workers a heads-up about impending layoffs. "I have companies calling me up asking about WARN, because they’re thinking about laying some people off," Gary Lafayette, an employment and labor attorney with Lafayette & Kumagai, told FOX Television Stations Tuesday. "It’s important for them to know what the rules are." Passed by Congress in 1988, the Worker Adjustment and Retraining Notification Act (WARN Act) helps ensure advance notice in cases of qualified plant closings and mass layoffs, according to the U.S.