On or before January 10 of each calendar year, the director shall prepare a statement based on records of the department declaring which of the employer tax schedules contained in Section 977 shall be in effect for that calendar year and whether the emergency solvency surcharge pursuant to Section 977.5 shall be added. The statement shall be a public record and shall be final and binding for that calendar year. The statement shall include the official tabulation of wages in subject employment made by the department for the purpose of Sections 977 and 977.5, a summary of the data upon which that tabulation was based, and the
sources from which those data were obtained, and shall further include a summary of the data upon which the computation of the balance in the Unemployment Fund was based, and their source. The director’s action under Sections 977, 977.5, and this section shall not constitute an authorized regulation.