That is news to me, I’ve inspected dozens of snowmobile trailers over the years. Along with my own sled, boat & camper trailers. Here is a price chart for vehicle inspections in NY.It does have trailers on it so i’m pretty sure they must be inspected each year. Hey, it’s Ny, they are gonna get cash any way they can.
http://www.nydmv.state.ny.us/forms/vs77.pdf