(a) The commission shall report to the Legislature the collections from each class of utility and expenditures, both direct and indirect, for regulatory and other authorized commission activities affecting each class. Where expenditures are for overhead, allocations of services common to several classes, or for commission-wide activities, the methods used to calculate the expenditures attributed to the class shall be described in reasonable detail.
(b) The report shall be furnished to the Legislature within 60 days after the end of the fiscal year, and shall be subject to audit. The commission shall maintain information and reports necessary to perform an audit pursuant to this section.