California Code, Government Code - GOV § 53232.3

(a) If a local agency reimburses members of a legislative body for actual and necessary expenses incurred in the performance of official duties, then a local agency shall provide expense report forms to be filed by the members of the legislative body for reimbursement for actual and necessary expenses incurred on behalf of the local agency in the performance of official duties.  Reimbursable expenses shall include, but not be limited to, meals, lodging, and travel.

(b) Expense reports shall document that expenses meet the existing policy, adopted pursuant to Section 53232.2, for expenditure of public resources.

(c) Members of a legislative body shall submit expense reports within a reasonable time after incurring the expense, as determined by the legislative body, and the reports shall be accompanied by the receipts documenting each expense.

(d) Members of a legislative body shall provide brief reports on meetings attended at the expense of the local agency at the next regular meeting of the legislative body.

(e) All documents related to reimbursable agency expenditures are public records subject to disclosure under the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1).