If the family has reported a change in family income or composition in a timely manner according to the PHA's policies, the PHA must provide the family with 30 days advance notice of any rent increases, and such rent increases will be effective the first day of the month beginning after the end of that 30-day period. Rent decreases will be effective on the first day of the first month after the date of the actual change leading to the interim reexamination of family income.
(ii) If the family has failed to report a change in family income or composition in a timely manner according to the PHA's policies, PHAs must implement any resulting rent increases retroactively to the first of the month following the date of the change leading to the interim reexamination of family income. Any resulting rent decrease must be implemented no later than the first rent period following completion of the reexamination. However, a PHA may apply rent decreases retroactively at the discretion of the PHA, in accordance with the conditions established by the PHA in written policy and subject to paragraph (b)(6)(iii) of this section.
(iii) A retroactive rent decrease may not be applied by the PHA prior to the later of the first of the month following:
(A) The date of the change leading to the interim reexamination of family income; or
(B) The effective date of the family's most recent previous interim or annual reexamination (or initial examination if that was the family's last examination).
(c) Streamlined income determination —(1) General. A PHA may elect to apply a streamlined income determination to families receiving fixed income, as described in paragraph (c)(3) of this section.
(2) Definition of “fixed income”. For purposes of this section, “fixed income” means periodic payments at