Ok, I think I can answer this one. If you're not in a big hurry, I'd be happy to ask my smith here in NY who is very good would almost certainly know and get back to you tomorrow.
BUT.. here's what I THINK is a good answer. technically an NY compliant gun would not require a higher weight modified trigger.. with a but. If he has the factory case with the sticker on it, you should be able to find out if what he has is the much more common NY/MA compliant trigger, which if I'm not mistaken due to Mass. requirements needs to be raised to 10lb. . I've seen alot of guns sold in NY to have the NY/MA compliance to save the trouble. Normal LEM trigger should be 7.3-8.5 lb.