In addition to the authority of a district to establish classifications for rates and charges and impose such rates and charges, a district may adjust or delay those rates and charges for low-income persons or classes of low-income persons , including but not limited to, low-income persons with disabilities and low-income senior citizens. Other financial assistance available to low-income persons shall be considered in determining charges and rates under this section. Notification of special rates or charges established under this section shall be provided to all persons served by the district annually and upon initiating service. Information on cost shifts caused by establishment of the special rates or charges shall be included in the notification. Any reduction in charges and rates granted to low-income persons in one part of a service area shall be uniformly extended to low-income persons in all other parts of the service area.