(iii) the aggregate disposable income (as defined by regulation of such agency as the mayor shall designate) for the current income tax year of all members of the household residing in the housing accommodation whose head of the household is a person with a disability does not exceed fifty thousand dollars beginning July first, two thousand fourteen. For purposes of this subparagraph, "aggregate disposable income" shall not include gifts or inheritances, payments made to individuals because of their status as victims of Nazi persecution, as defined in P.L. 103-286, or increases in benefits accorded pursuant to the social security act or a public or private pension paid to any member of the household which increase, in any given year, does not exceed the consumer price index (all items United States city average) for such year which take effect after the eligibility date of the head of the household receiving benefits under this section, whether received by the head of the household or any other member of the household.