By MICHAEL VIRTANEN

(ALBANY, N.Y., AP) – Key measures of New York’s tough new gun law have kicked in, meaning owners of firearms now reclassified as assault weapons are required to register the guns. There are also new limits on the number of bullets allowed in magazines.

The new provisions took effect Monday. New York’s affiliate of the National Rifle Association says it expects to ask a federal judge late in the afternoon to immediately halt the magazine limit.

The New York State Rifle & Pistol Association says the law violates the constitutional rights of law-abiding citizens “to keep commonly possessed firearms.”

Association president Tom King says they are advising members to obey the law until it’s proven unconstitutional.

State police have posted online forms for registrations required by April 15, 2014.