A provincial assessment authority is an organization responsible for determining property values across a province for taxation purposes. Examples include the Municipal Property Assessment Corporation (MPAC) in Ontario, BC Assessment in British Columbia, and the Alberta Assessment Services (through Alberta Municipal Affairs). These bodies apply consistent valuation methods across all properties in the province, ensuring fairness in how properties are assessed. They maintain property records, respond to inquiries, and handle initial assessment appeals. Having provincial authorities rather than municipal assessors promotes uniformity and prevents municipalities from manipulating values to affect tax revenue.