The officers and employees of the County of Sacramento may act, ex officio, as officers and employees of the regional district formed pursuant to Section 5506.10 and may discharge the authority and responsibility specified in this article. The County of Sacramento may provide the services and facilities needed to carry out the functions of the regional district. The proceeds of assessments levied pursuant to Section 5539.10 may be expended to reimburse the county for the actual costs of those services and facilities.