A central planning responsibility for LAFCO is the determination of a sphere of influence for each local agency under its jurisdiction. LAFCO establishes, amends, and updates spheres of influence to designate the territory it believes represents the appropriate future service area and jurisdictional boundary of the affected agency. All jurisdictional changes, such as annexations and detachments, must be consistent with the spheres of influence of the affected local agencies with limited exceptions. LAFCO reviews and updates each local agency’s sphere every five years as needed.