Prior to each July 15, the department shall prepare and forward to the Controller a report identifying the amounts to be deducted from the allocations under Sections 2104 and 2107 as provided in Sections 2104.1 and 2107.6. The amounts reported shall be the amount of funds allocated to cities for grade separation projects included in allocations to cities made pursuant to Chapter 10 (commencing with Section 2450) of Division 3 in the preceding fiscal year and the amount of funds allocated to counties for grade separation projects included in allocations to counties made pursuant to Chapter 10 (commencing with Section 2450) of Division 3 in the preceding fiscal year.