Mass Appraisal Specialist (MAS)
The purpose of the MAS designation is to recognize professionalism and competency in a wide
range of matters covering mass appraisal theories, techniques and application.
IAAO members will be
able to use this designation in conjunction with the valuation of a wide range of property types,
property appraisal and assessment administration issues and property tax policy statements in
accordance with IAAO's commitment to excellence.