I wrote out a post about how you register to vote in New York, but it never posted so I guess it is lost in cyberspace. If you are interested in how to register to vote in New York, check out
http://www.vote.nyc.ny.us/register.jsp for details.
I don't think that NPC sororities can make registering to vote mandatory, but I think that we can show our members how to register. It really isn't difficult or time consuming. At the time of the founding of all of the current NPCs, our Founders were not permitted to vote simply because they were women. Times have changed, and we should take advantage of the opportunities our Founders did not have.