Not later than May 15 of each year, the Department of Finance shall notify the Legislature and the Chancellor’s Office of the California Community Colleges of the amount of revenue estimated to be available to community college districts during the next fiscal year from local property taxes, exclusive of bond interest and redemption, and timber taxes received. Not later than March 15 of each year, the chancellor’s office shall certify to the Department of Finance the amount of revenue available from these tax sources for the current fiscal year. The Department of Finance shall subtract the total amount of available revenue certified by the chancellor’s office from the total amount of available revenue estimated by the department the preceding May. The Department of Finance shall notify the Legislature of the resulting difference and shall advise the Legislature as to whether the difference represents a net surplus or a net deficit in the funds appropriated to meet the requirements of Section 84750.