NYS DMV - Information for Dealers, Repair Shops, and Inspection Stations
Basically the pads have to be down to the steel for rejection. Bonded linings less than 1/16" of pad, riveted 1/32" pad to rivet. Rotor- distortion or scoring which impairs the braking system.
The DMV site does list all the requirements for insp. but is a little difficult to find. Booklet C79 over 80 pages then amendments after that.
http://www.dmv.ny.gov/forms/cr79.pdf
There it is. Have fun