After receiving the values for property taxation purposes certified to him by the department, the county assessor shall determine the net taxable value for all property allocated to governmental units in the county and subject to valuation for property taxation purposes, whether valued by him or by the department. No later than June 15 of each year, the county assessor shall certify to the department the net taxable values for all property allocated to governmental units in the county and subject to property taxation. The net taxable values of property shall be certified according to governmental units within the county. The assessor’s certification shall include a statement of all property valuations that are the subject of a pending protest, whether protested locally or to the department, and a statement of the uncontroverted valuation in the pending protests.