Section 25131 Of Article 2. Uniform Division Of Income For Tax Purposes Act From California Revenue And Taxation Code >> Division 2. >> Part 11. >> Chapter 17. >> Article 2.

. The average value of property shall be determined by averaging the values at the beginning and ending of the taxable year but the Franchise Tax Board may require the averaging of monthly values during the taxable year if reasonably required to reflect properly the average value of the taxpayer's property.