New York Laws
Article 34-A - Operation of Motorcycles
1251 - Riding on Motorcycles.

(b) A person shall ride upon a motorcycle only while sitting astride
the seat, facing forward, with one leg on each side of the motorcycle,
unless said person is seated in a sidecar affixed to said motorcycle.
(c) No person shall operate a motorcycle while carrying any package,
bundle or other article which prevents him from keeping both hands on
the handlebars.
(d) No operator shall carry any person, nor shall any person ride, in
a position that will interfere with the operation or control of the
motorcycle or the view of the operator.