He said the department was urging diplomats to comply with labor laws and was notifying domestic workers of their rights when they applied for visas.

The advocate would also notify workers and their unions of pending criminal cases.

The board would notify workers whose records of exposure to dangerous workplace substances suggest they face risk of illness.

He also joined a filibuster against a measure requiring companies to notify workers when they had been exposed to toxic substances.

Many big companies already have agreements to notify workers in advance of layoffs; that's partly what unions are for.

It declined to specify the plants that would close, until it had notified workers and customers.

The employers are also required to notify workers of the availability of the sanitation resources and provide "opportunity for reasonable use."

The shrieking alarms served as a bulletin to workers here, and the message beepers notified workers who weren't at the center.

The agency said Tuesday that it would notify workers later this year that they have been selected.

Mr. Flaherty said the company expected to notify workers within the next few days when they should return.