(

a) In determining or redetermining the fair share, the Department of Finance may consider the factors of cost distribution and cost estimation as it deems necessary, except that, as to the proceeds of those taxes, the use of which is restricted by

Article XIX of the California Constitution, the Department of Finance shall assess only those administrative costs ascertained as being necessarily incurred in connection with highway purposes as set forth in the article. As to funds collected pursuant to

Section of the Food and Agricultural Code, the Department of Finance shall assess only those administrative costs incurred in connection with the enforcement of the law under which the funds were derived. (

b) In determining the share of costs to be borne by the California Exposition and State Fair, the Department of Finance shall take into account any reduction in the services provided to the California Exposition and State Fair as a consequence of the assumption of the various functions that the California Exposition and State Fair is authorized to assume by the act that amended this

section during the 1997–98 Regular Legislative Session, and shall reduce the fair share of the California Exposition and State Fair accordingly. From its operating funds, the California Exposition and State Fair shall reimburse the Central Service Cost Recovery Fund or the General Fund, in accordance with subdivision (

b) of

Section 11274, for its share of costs determined pursuant to this subdivision.