A detailed legalese discussion of the transfer of ammo in NYS is presented in a White Paper by the Arbalest Quarrel (see the link below).
http://www.arbalestquarrel.com/pdf-white-papers/wp-1001.pdf
According to the Arbalest Quarrel, you may download and share Arbalest Quarrel White Papers as informational material only. Any and all editing or modification of these White Papers is strictly prohibited.