The Department of Labor has asked the Supreme Court of the United States to review an appeals court ruling that put the kibosh on the agency’s policy that mortgage loan officers do not qualify under the administrative exemption to overtime pay. The legal question presented in Thomas E. Perez, Secretary of Labor, et al., petitioners, v. Mortgage Bankers Association, et al., is whether a federal agency must engage in notice-and-comment rulemaking before it can significantly alter an interpretation of an agency regulation. Last October, the U.S. Court of Appeals for the District of Columbia refused...