Notwithstanding Section 11892, the board of a district which has owned and operated an electric distribution system for at least eight years and has a population of 250,000 or more may, to facilitate the business of the district, provide for the creation and administration of revolving funds as the needs of the district may require. The aggregate amount of the revolving funds shall not exceed two hundred thousand dollars ($200,000). The revolving funds shall be disbursed in accordance with the rules adopted by the board, and all payments from any revolving fund shall be reported to the board and vouchers filed therefor.