A pretrial diversion program established under this division may apply for grants, may accept donations from individuals or corporations, and may receive funding or appropriations from city, county, or state agencies or departments to be used in the maintenance or expansion of the pretrial diversion program. Absent an express agreement between the county commission, sheriff, and district attorney, no county commission or any of its departments or agencies shall be required to participate in, or provide funding for, any pretrial diversion program established under this division.