NEW YORK - New restrictions on ammunition sales have taken effect in New York State.

The changes are part of a law passed by Gov. Andrew Cuomo a year ago, one month after the mass shooting at Sandy Hook Elementary School in Newtown, Conn.

All sellers are now required to register with state police for a license, and buyers must appear in person to get bullets. The in-person requirement means that even Internet sales will require face-to-face involvement.

According to state police, the law will also require retailers to record sales and do background checks on buyers, all in an effort to keep weapons out of the hands of convicted felons, the mentally ill and anyone else who may be prohibited from having them.