(a) The petition shall be accompanied by a fee in an amount established by the board of supervisors as is necessary to reimburse the county for all costs incurred by it in connection with the proposed organization of the district. The board of supervisors may charge the district for actual expenses incurred by the county in connection with the proceedings for the formation of the district.
(b) Upon the establishment of the district, the district shall reimburse those who provided the funds specified in subdivision (a) from assessments collected pursuant to this article.