The purpose of the organization is to promote:

• Cooperation of the assessing officers of California in matters of mutual interest and responsibility;
• Improvement of assessment procedures for the public good;
• Improvement in the assessment laws of the State of California for the public good;
• Liaison with the State Board of Equalization
• Liaison with the International Association of Assessing Officers
• Promote cooperation and communication among the various Assessors and their personnel within a regional group