(a) An agreement, project, or use of authority authorized under this chapter shall be completely voluntary for all participating entities.
(b) Nothing in this chapter shall be construed to interfere with any existing programs or projects, authorities, or obligations for municipal wastewater agencies or stormwater dischargers.
(c) It is the intent of the Legislature in enacting this chapter merely to allow local agencies interested in pursuing the types of projects described in this chapter to proceed without additional legislative changes to their authorizing statutes.