Last month, the U.S. Department of Homeland Security's proposed rule that would force employers to comply with "no-match" letters from the Social Security Administration, largely targeted at immigration issues, was put on hold. For now the San Francisco-based federal judge wants more time to review the order further delaying its implementation.

The judge now says it will be later this week, maybe next, before he rules on the matter. Judge Charles Breyer says the case has such broad-reaching, national implications that it needs more careful consideration.

Under the DHS proposal, which is designed to address immigration rules, the Social Security Administration would send letters to employers, notifying them of employees whose names don't match their Social Security numbers. The judge's delay also places about 140,000 such letters from being sent to U.S. employers.

The judge's order that put the new rule on hold was set to expire today. The American Federation of Labor and Congress of Industrial Organizations, the American Civil Liberties Union and the National Immigration Law Center, followed tha action by filing a lawsuit as well.