Note: An earlier version of this story incorrectly stated that certain job duties could render positions exempt from overtime pay. It’s been corrected to reflect that the duties test is one of several criteria needed for overtime exemption.Companies have only a few months to decide how they will compensate salaried employees who will be newly deemed eligible for overtime pay under a new federal rule that takes effect Dec. 1.The U.S. Department of Labor on Wednesday announced changes to criteria that make certain …