(a) When the Attorney General shall undertake the trial or preparation for trial of any action on behalf of any state department, agency, commission, board, authority, bureau, or any other legislative, judicial, or executive body of the state, such state agency involved is authorized and directed to reimburse the Department of Law for actual expenses incurred for court costs, filing costs, witness fees, costs of reporting and preparing transcripts of records, costs for depositions, interrogatories, and other methods of discovery, and any other expenses incurred for such services, except salaries, expenses, and subsistence allowances paid regular employees of the Department of Law.

(b) From time to time the Attorney General shall submit to the state agency involved a statement of the expenses of such trial or trial preparation incurred by the Department of Law, such statements to include detailed, itemized statements of the costs thereof as contemplated by this Code section; and, notwithstanding any other provision of law, the state agency involved is authorized and directed to reimburse the Department of Law for such expenses from funds appropriated to or available to such state agency.