The board may designate the Treasurer, the Auditor, the County Counsel, and the Clerk of the County of Orange as the treasurer, auditor, counsel, and clerk of the district, and the treasury of that county may be designated the depositary for district funds for such time as the board may determine. Any costs incurred by the Treasurer, Auditor, County Counsel, and Clerk of the County of Orange in performing services for the district shall be borne by the district.