(1) Eligible Senior Citizen shall mean a residential customer of record of the Water Department age sixty-five (65) or older residing in the City of Philadelphia whose gross annual household income does not exceed that set forth at § 19-1901(2).

(2) Gross annual household income shall mean an amount not to exceed fourteen thousand ($14,000) dollars, except as adjusted to reflect the net change in the Consumer Price Index (All Urban Consumers (CPI-U) for Philadelphia (All Items)), such adjustment to occur from time to time at the discretion of the Water Commissioner, but no less often than at each general residential customer rate determination.