The fees collected under the provisions of sections 67.1230 to 67.1253 shall be deposited by the board of supervisors in a financial institution within the county authorized by law to receive deposit of county funds and shall expend such funds only for the operation of the district and the purposes specified in sections 67.1230 to 67.1253. Where the board of supervisors has entered into an agreement with one or more other county agricultural commodity research districts, the joint board of supervisors may designate one financial institution in any county represented by a district party to the contract. The board may employ such personnel as necessary to carry out the provisions of sections 67.1230 to 67.1253.