Assessor Resources Here are just a few resources for assessors. New York State (NYS) Office of Real Property Tax Services (ORPTS) NYS ORPTS Uniform Assessment Standards NYS ORPTS Assessors' Manual NYS ORPTS Forms NYS ORPTS Legal Topics New York State Association of County Directors of Real Property Tax Services NYS Assessors Association International Association of Assessing Officers (IAAO) IAAO Technical Standards Connecticut Association of Assessing Officers (CAAO) County Equalization Tables United States Internal Revenue Service (IRS) Tax Certiorari & Condemnation Proceedings - Westchester Supreme Court | New York Courts NYS Department of Agriculture and Markets NYS Archives NYS Department of Environmental Conservation NYS Department of Taxation and Finance