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ALBANY, N.Y.- New York's Legislature has passed the nation's toughest gun control law and the first since the Newtown, Conn., school shooting.

The bill calls for a tougher assault weapons ban and provisions to try to keep guns out of the hands of the mentally ill who make threats.

With Gov. Andrew Cuomo's signature Tuesday, parts of the measure that sped through the Legislature in two days take effect immediately.

The law calls for a tougher assault weapons ban and provisions to try to keep guns away from mentally ill people who make threats.

It also calls for background checks on ammunition, a ban on large magazines, stiffer penalties for gun crimes and background checks even on private sales, such as those at gun shows.

Mental health professionals will be required to report any patient who they believe to be a threat to use a gun illegally. The patient's gun could be confiscated.